feat: add support for anonymous_authentication_config

[DrFaust92]

No description provided.

[apeabody]

/gcbrun

[apeabody]

Thanks for the contribution @DrFaust92!

Checking submodule's files generation
diff -r '--exclude=.terraform' '--exclude=.kitchen' '--exclude=.git' /workspace/cluster.tf /tmp/tmp.BQLJdIFYWI/workspace/cluster.tf
216d215
< 
Error: submodule's files generation has not been run, please run the
'make build' command and commit changes

[DrFaust92]

Thanks for the contribution @DrFaust92!

Checking submodule's files generation
diff -r '--exclude=.terraform' '--exclude=.kitchen' '--exclude=.git' /workspace/cluster.tf /tmp/tmp.BQLJdIFYWI/workspace/cluster.tf
216d215
< 
Error: submodule's files generation has not been run, please run the
'make build' command and commit changes

done

[apeabody]

/gcbrun

[apeabody]

/gcbrun

[apeabody]

/gemini review

[gemini-code-assist]

Code Review

This pull request introduces support for anonymous_authentication_config by adding the anonymous_authentication_config_mode variable. The changes are consistently applied across the root module and all relevant submodules, including updates to documentation and metadata. The implementation is straightforward and correct. My only suggestion is to add a validation block to the new variable in all variables.tf files to ensure only valid values (ENABLED or LIMITED) are used, which will improve the module's robustness against misconfiguration.

[apeabody]

Thanks for the contribution @DrFaust92!