Bump Elasticsearch to a minimum of JDK 21 (#112252)

Author: ChrisHegarty

.ci/java-versions-aarch64.properties

@@ -4,4 +4,4 @@
 # build and test Elasticsearch for this branch. Valid Java versions
 # are 'java' or 'openjdk' followed by the major release number.
 
-ES_BUILD_JAVA=jdk17
+ES_BUILD_JAVA=jdk21

.ci/java-versions-fips.properties

@@ -4,4 +4,4 @@
 # build and test Elasticsearch for this branch. Valid Java versions
 # are 'java' or 'openjdk' followed by the major release number.
 
-ES_BUILD_JAVA=openjdk17
+ES_BUILD_JAVA=openjdk21

.ci/java-versions.properties

@@ -4,4 +4,4 @@
 # build and test Elasticsearch for this branch. Valid Java versions
 # are 'java' or 'openjdk' followed by the major release number.
 
-ES_BUILD_JAVA=openjdk17
+ES_BUILD_JAVA=openjdk21

build-tools-internal/src/integTest/resources/org/elasticsearch/gradle/internal/fake_git/remote/build-tools-internal/src/main/resources/minimumCompilerVersion

@@ -1 +1 @@
-17
+21

build-tools-internal/src/main/resources/minimumCompilerVersion

@@ -1 +1 @@
-17
+21

build-tools-internal/src/main/resources/minimumRuntimeVersion

@@ -1 +1 @@
-17
+21

x-pack/plugin/esql/compute/gen/src/main/java/org/elasticsearch/compute/gen/AggregatorProcessor.java

@@ -52,7 +52,7 @@ public Set<String> getSupportedAnnotationTypes() {
 
     @Override
     public SourceVersion getSupportedSourceVersion() {
-        return SourceVersion.RELEASE_17;
+        return SourceVersion.RELEASE_21;
     }
 
     @Override

x-pack/plugin/esql/compute/gen/src/main/java/org/elasticsearch/compute/gen/ConsumeProcessor.java

@@ -48,7 +48,7 @@ public Set<String> getSupportedAnnotationTypes() {
 
     @Override
     public SourceVersion getSupportedSourceVersion() {
-        return SourceVersion.latest();
+        return SourceVersion.RELEASE_21;
     }
 
     @Override

x-pack/plugin/esql/compute/gen/src/main/java/org/elasticsearch/compute/gen/EvaluatorProcessor.java

@@ -44,7 +44,7 @@ public Set<String> getSupportedAnnotationTypes() {
 
     @Override
     public SourceVersion getSupportedSourceVersion() {
-        return SourceVersion.RELEASE_17;
+        return SourceVersion.RELEASE_21;
     }
 
     @Override