[FLINK-33903][ci] Reenable tests in GHA

[snuyanzin]

What is the purpose of the change

The PR reenables tests in GHA

Brief change log

add non root user in GHA in order to enable tests expecting not enough permissions

Verifying this change

GHA

Does this pull request potentially affect one of the following parts:

• Dependencies (does it add or upgrade a dependency): ( no)
• The public API, i.e., is any changed class annotated with @Public(Evolving): ( no)
• The serializers: ( no)
• The runtime per-record code paths (performance sensitive): (no)
• Anything that affects deployment or recovery: JobManager (and its components), Checkpointing, Kubernetes/Yarn, ZooKeeper: (no )
• The S3 file system connector: (no)

Documentation

• Does this pull request introduce a new feature? ( no)
• If yes, how is the feature documented? (not applicable)

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Was generative AI tooling used to co-author this PR?

• Yes (please specify the tool below)

[flinkbot]

CI report:

• efc076c Azure: SUCCESS

Bot commands

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• @flinkbot run azure re-run the last Azure build

[snuyanzin]

rebased
link to GHA from my fork https://github.com/snuyanzin/flink/actions/runs/24959535073
all tests passing except for one in table which has a different root cause and addressed here #28029

[snuyanzin]

@flinkbot run azure