generator: Remove @BetaApi from Resource Name Builder Methods

[burkedavison]

1. Per-pattern Builders

   • Example: https://github.com/googleapis/sdk-platform-java/blame/decd7f60017d45288e6c12493fa21e06f9c5f77c/showcase/proto-gapic-showcase-v1beta1/src/main/java/com/google/showcase/v1beta1/BlurbName.java#L372
   • Example: https://github.com/googleapis/sdk-platform-java/blame/decd7f60017d45288e6c12493fa21e06f9c5f77c/showcase/proto-gapic-showcase-v1beta1/src/main/java/com/google/showcase/v1beta1/BlurbName.java#L403
   • Generation logic: https://github.com/googleapis/sdk-platform-java/blame/decd7f60017d45288e6c12493fa21e06f9c5f77c/gapic-generator-java/src/main/java/com/google/api/generator/gapic/composer/resourcename/ResourceNameHelperClassComposer.java#L510

2. Static factory methods

   • Example:

     sdk-platform-java/showcase/proto-gapic-showcase-v1beta1/src/main/java/com/google/showcase/v1beta1/BlurbName.java

     Lines 149 to 171 in decd7f6

     	@BetaApi("The static create methods are not stable yet and may be changed in the future.")
     	public static BlurbName ofUserLegacyUserBlurbName(String user, String legacyUser, String blurb) {
     	return newBuilder().setUser(user).setLegacyUser(legacyUser).setBlurb(blurb).build();
     	}
     	@BetaApi("The static create methods are not stable yet and may be changed in the future.")
     	public static BlurbName ofUserBlurbName(String user, String blurb) {
     	return newUserBlurbBuilder().setUser(user).setBlurb(blurb).build();
     	}
     	@BetaApi("The static create methods are not stable yet and may be changed in the future.")
     	public static BlurbName ofRoomBlurbName(String room, String blurb) {
     	return newRoomBlurbBuilder().setRoom(room).setBlurb(blurb).build();
     	}
     	@BetaApi("The static create methods are not stable yet and may be changed in the future.")
     	public static BlurbName ofRoomLegacyRoomBlurbName(String room, String legacyRoom, String blurb) {
     	return newRoomLegacyRoomBlurbBuilder()
     	.setRoom(room)
     	.setLegacyRoom(legacyRoom)
     	.setBlurb(blurb)
     	.build();
     	}

   • Generation logic: https://github.com/googleapis/sdk-platform-java/blob/main/gapic-generator-java/src/main/java/com/google/api/generator/gapic/composer/resourcename/ResourceNameHelperClassComposer.java#L604-L606

3. Static format methods

   • Example: https://github.com/googleapis/sdk-platform-java/blob/decd7f60017d45288e6c12493fa21e06f9c5f77c/showcase/proto-gapic-showcase-v1beta1/src/main/java/com/google/showcase/v1beta1/BlurbName.java#L177C13-L200
   • Generation logic: https://github.com/googleapis/sdk-platform-java/blob/main/gapic-generator-java/src/main/java/com/google/api/generator/gapic/composer/resourcename/ResourceNameHelperClassComposer.java#L604-L606