Pass specific env vars to logGroomerSideCar

[mrestivill]

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In our deployment we need to pass specific environment variables to logGroomerSidecar in both scheduler and triggered versions. This is a proposal to add them using envFrom.

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[romsharon98]

Can you add it to other logGroomer we have, and add tests here?

[jedcunningham]

It feels a little weird to include the custom env if we aren't also including the standard env.

There is also #46003 that was opened to allow custom env vars just for the log groomers, which is probably a better answer.