chore: use snapshot and add protobuf 4.33.0

Author: diegomarquezp

gapic-libraries-bom/pom.xml

@@ -4,7 +4,7 @@
   <groupId>com.google.cloud</groupId>
   <artifactId>gapic-libraries-bom</artifactId>
   <packaging>pom</packaging>
-  <version>1.74.1</version><!-- {x-version-update:google-cloud-java:current} -->
+  <version>1.75.0-SNAPSHOT</version><!-- {x-version-update:google-cloud-java:current} -->
   <name>Google Cloud Java BOM</name>
   <description>
     BOM for the libraries in google-cloud-java repository. Users should not
@@ -15,7 +15,7 @@
   <parent>
     <artifactId>google-cloud-pom-parent</artifactId>
     <groupId>com.google.cloud</groupId>
-    <version>1.74.1</version><!-- {x-version-update:google-cloud-java:current} -->
+    <version>1.75.0-SNAPSHOT</version><!-- {x-version-update:google-cloud-java:current} -->
     <relativePath>../google-cloud-pom-parent/pom.xml</relativePath>
   </parent>
 

google-cloud-jar-parent/pom.xml

@@ -24,6 +24,13 @@
 
   <dependencyManagement>
     <dependencies>
+      <dependency>
+        <groupId>com.google.protobuf</groupId>
+        <artifactId>protobuf-bom</artifactId>
+        <version>4.33.0</version>
+        <type>pom</type>
+        <scope>import</scope>
+      </dependency>
       <dependency>
         <groupId>com.google.cloud</groupId>
         <artifactId>google-cloud-shared-dependencies</artifactId>