helm chart: Support nodeSelector, tolerations and affinity on the booloader pod

[jfouchard]

What

The bootloader pod won't schedule on some clusters without the usual array of nodeSelector, tolerations and affinity.

How

Add support for them in the helm chart.

🚨 User Impact 🚨

No breaking changes - they are optional.

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Tests

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[alafanechere]

Hey @jfouchard we apologize for the late reply! It looks like our automated PR labeler did not work an your PR was not triaged by our team because it missed the community label.
Do you mind fixing the conflicts on the branch if you are still willing to make this change happen on the Helm chart?

[jfouchard]

Thanks @alafanechere - Seems like most of the work had been done by various other commits in the last month. Just affinity still missing from my original commit. Here is a clean PR.

[alafanechere]

Thank you @jfouchard !