test: test add and generate geminidataanalytics

[zhumin8]

steps taken:

• revert recent code addition for API pathgit revert 946dfb4c66
• sync librarian.yaml to condition prior to addition in 946dfb4: migrate ., manual keep librarian version
• insert pom markers (this should be done separately, running here just to allow this test)migrate -insert-markers .
• go run github.com/googleapis/librarian/cmd/librarian@${V} add google/cloud/geminidataanalytics/v1
• go run github.com/googleapis/librarian/cmd/librarian@${V} generate geminidataanalytics
• clean up irrelevant changes so this change is readablegit restore --source=main --staged --worktree ':(top)*/*' ':(top,exclude)java-geminidataanalytics/'

For googleapis/librarian#6137

[gemini-code-assist]

Code Review

This pull request updates the dependency configurations and modules for the Gemini Data Analytics library. However, due to a pathspec bug in the cleanup command used during the PR preparation, top-level files like generation_config.yaml and versions.txt were not properly restored to main. This resulted in the accidental removal of the v1 GAPIC configuration, missing version numbers in README.md, and an incorrect 0.0.0-SNAPSHOT version in Version.java. The feedback advises restoring these top-level files to correct the configuration and regenerate the code with the proper 0.21.0-SNAPSHOT version.

[zhumin8]

Generated diffs as expected. conclude this test.