Change serialization inside GenAIGeminiCreateBatchJobOperator

[Crowiant]

Fix #61116

Found serialization error on Airflow 2. This PR will unblock the release of a new version of google provider.

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

• Yes (please specify the tool below)

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• Read the Pull Request Guidelines for more information. Note: commit author/co-author name and email in commits become permanently public when merged.
• For fundamental code changes, an Airflow Improvement Proposal (AIP) is needed.
• When adding dependency, check compliance with the ASF 3rd Party License Policy.
• For significant user-facing changes create newsfragment: {pr_number}.significant.rst or {issue_number}.significant.rst, in airflow-core/newsfragments.

[shahar1]

I just figured out that we are lacking unit tests for gen_ai operators module entirely.
I'll be happy if you could at some for the modified methods as part of this PR.

For the rest of the operators - I created #61261 (I'd like to handle it before the next release, to prevent potential regressions in the future).
Thank you!

CC: @VladaZakharova @MaksYermak

[MaksYermak]

I just figured out that we are lacking unit tests for gen_ai operators module entirely. I'll be happy if you could at some for the modified methods as part of this PR.

For the rest of the operators - I created #61261 (I'd like to handle it before the next release, to prevent potential regressions in the future). Thank you!

CC: @VladaZakharova @MaksYermak

Hello @shahar1,
We have unit tests for GenAI operators here https://github.com/apache/airflow/blob/main/providers/google/tests/unit/google/cloud/operators/test_gen_ai.py. Please clarify for me if I misunderstood you and you meant some additional unit tests to the existing one?

[shahar1]

I just figured out that we are lacking unit tests for gen_ai operators module entirely. I'll be happy if you could at some for the modified methods as part of this PR.

For the rest of the operators - I created #61261 (I'd like to handle it before the next release, to prevent potential regressions in the future). Thank you!

CC: @VladaZakharova @MaksYermak

Hello @shahar1,
We have unit tests for GenAI operators here https://github.com/apache/airflow/blob/main/providers/google/tests/unit/google/cloud/operators/test_gen_ai.py. Please clarify for me if I misunderstood you and you meant some additional unit tests to the existing one?

Wow, somehow I've completely missed this one! My apologies.
So just add unit tests for the existing changes and I'll get this merged.

[Crowiant]

Hello @shahar1 could you please review the PR? I added unit tests as you requested. Thank you!

[vincbeck]

Merging now and I'll get it released today/tomorrow. The test failing is failing in main so this is not relevant to the PR