Add overrides to template fields of Google Cloud Run Jobs Execute Operator

[guillaumeblaquiere]

Close #36132

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[boring-cyborg]

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[guillaumeblaquiere]

@potiuk some checks fail because of static files. I haven't changed anything on that part. Does this block the merge?

[potiuk]

Nope. I fixed it already earlier today in #36162

[boring-cyborg]

Awesome work, congrats on your first merged pull request! You are invited to check our Issue Tracker for additional contributions.