ci: allow nonexistent profile in google-cloud-bigtable (#2611)

Our new release job script specifies profiles that might not exist in all Java projects in our release pipeline. The requireProfileIdsExist enforcer rule fails in that case.

```
[ERROR] Failed to execute goal org.apache.maven.plugins:maven-enforcer-plugin:3.5.0:enforce (enforce-valid-profile) on project google-cloud-bigtable: 
[ERROR] Rule 0: org.apache.maven.enforcer.rules.RequireProfileIdsExist failed with message:
[ERROR] The requested profile doesn't exist: release-staging-repository
```

Therefore, let's disable the requireProfileIdsExist rule during the release. This change created a profile that does that:

```
    <profile>
      <id>enable-enforcer-rules</id>
      <activation>
        <property>
          <!-- By default, Maven runs the enforcer rules. The shared release script
            may pass profile name that doesn't exist in this project. Let's ignore
            the enforcer rule (requireProfileIdsExist) in that case, leveraging
            the presence of the performRelease property. -->
          <name>!performRelease</name>
        </property>
...
```

Author: suztomo

google-cloud-bigtable/pom.xml

@@ -349,6 +349,69 @@
   </dependencies>
 
   <profiles>
+    <profile>
+      <id>enable-enforcer-rules</id>
+      <activation>
+        <property>
+          <!-- By default, Maven runs the enforcer rules. The shared release script
+            may pass profile name that doesn't exist in this project. Let's ignore
+            the enforcer rule (requireProfileIdsExist) in that case, leveraging
+            the presence of the performRelease property. -->
+          <name>!performRelease</name>
+        </property>
+      </activation>
+      <build>
+        <plugins>
+          <plugin>
+            <groupId>org.apache.maven.plugins</groupId>
+            <artifactId>maven-enforcer-plugin</artifactId>
+            <version>3.5.0</version>
+            <executions>
+              <!-- Prevent users from mistyping a profile name -->
+              <execution>
+                <id>enforce-valid-profile</id>
+                <configuration>
+                  <rules>
+                    <requireProfileIdsExist/>
+                  </rules>
+                </configuration>
+                <goals>
+                  <goal>enforce</goal>
+                </goals>
+              </execution>
+              <!-- Ensure that greatest version of each transitive dependency got selected -->
+              <execution>
+                <id>enforce-dependency-upper-bound</id>
+                <configuration>
+                  <rules>
+                    <requireUpperBoundDeps/>
+                  </rules>
+                </configuration>
+                <goals>
+                  <goal>enforce</goal>
+                </goals>
+              </execution>
+            </executions>
+            <!--
+              workaround for https://github.com/mojohaus/extra-enforcer-rules/issues/132
+              Remove when it's fixed upstream.
+            -->
+            <dependencies>
+              <dependency>
+                <groupId>org.codehaus.mojo</groupId>
+                <artifactId>extra-enforcer-rules</artifactId>
+                <version>1.8.0</version>
+              </dependency>
+              <dependency>
+                <groupId>org.apache.maven.shared</groupId>
+                <artifactId>maven-dependency-tree</artifactId>
+                <version>3.3.0</version>
+              </dependency>
+            </dependencies>
+          </plugin>
+        </plugins>
+      </build>
+    </profile>
     <profile>
       <id>enable-verbose-grpc-logs</id>
       <properties>
@@ -668,54 +731,6 @@
           </execution>
         </executions>
       </plugin>
-      <plugin>
-        <groupId>org.apache.maven.plugins</groupId>
-        <artifactId>maven-enforcer-plugin</artifactId>
-        <version>3.5.0</version>
-        <executions>
-          <!-- Prevent users from mistyping a profile name -->
-          <execution>
-            <id>enforce-valid-profile</id>
-            <configuration>
-              <rules>
-                <requireProfileIdsExist/>
-              </rules>
-            </configuration>
-            <goals>
-              <goal>enforce</goal>
-            </goals>
-          </execution>
-          <!-- Ensure that greatest version of each transitive dependency got selected -->
-          <execution>
-            <id>enforce-dependency-upper-bound</id>
-            <configuration>
-              <rules>
-                <requireUpperBoundDeps/>
-              </rules>
-            </configuration>
-            <goals>
-              <goal>enforce</goal>
-            </goals>
-          </execution>
-        </executions>
-        <!--
-          workaround for https://github.com/mojohaus/extra-enforcer-rules/issues/132
-          Remove when it's fixed upstream.
-        -->
-        <dependencies>
-          <dependency>
-            <groupId>org.codehaus.mojo</groupId>
-            <artifactId>extra-enforcer-rules</artifactId>
-            <version>1.8.0</version>
-          </dependency>
-          <dependency>
-            <groupId>org.apache.maven.shared</groupId>
-            <artifactId>maven-dependency-tree</artifactId>
-            <version>3.3.0</version>
-          </dependency>
-        </dependencies>
-      </plugin>
-
       <plugin>
         <groupId>org.apache.maven.plugins</groupId>
         <artifactId>maven-dependency-plugin</artifactId>

google-cloud-bigtable/src/test/java/com/google/cloud/bigtable/admin/v2/models/TableTest.java

@@ -90,7 +90,8 @@ public void testFromProto() {
     assertThat(result.isAutomatedBackupEnabled()).isTrue();
     assertEquals(
         result.getAutomatedBackupPolicy().viewConfig(),
-        "AutomatedBackupPolicy{com.google.bigtable.admin.v2.Table$AutomatedBackupPolicy.retention_period=seconds: 1\n"
+        "AutomatedBackupPolicy{com.google.bigtable.admin.v2.Table$AutomatedBackupPolicy.retention_period=seconds:"
+            + " 1\n"
             + //
             "nanos: 99\n"
             + //