feat: added affinity to task & job managers specs

[sgraham785]

• adds affinity passthrough to jobmanager and taskmanager podSpec
• small update to comment for Tolerations fields

[sgraham785]

@googlebot I consent.

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[google-cla[bot]]

Thanks for your pull request. It looks like this may be your first contribution to a Google open source project (if not, look below for help). Before we can look at your pull request, you'll need to sign a Contributor License Agreement (CLA).

:memo: Please visit https://cla.developers.google.com/ to sign.

Once you've signed (or fixed any issues), please reply here with @googlebot I signed it! and we'll verify it.

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[sgraham785]

@googlebot I signed it!

[functicons]

/gcbrun

[sgraham785]

@functicons I am not sure how the Trigger check works but looks like you ran the required cmd and it still shows fail. Can you please address this? We would really like to get this merged for our use-case, thank you!