Fix Edit Yaml Footer's layout issue

[momesgin]

Summary

Fixes #10880

Occurred changes and/or fixed issues

Technical notes summary

Removed flexContent prop that was added a long time ago but never really used. The issue wasn't limited to the Pods page, basically it was happening anywhere in the app if the yaml section was too short.

Areas or cases that should be tested

Any place that Yaml Editor is displayed.

Areas which could experience regressions

I did my best to make sure this doesn't break any pages by checking many places that the Yaml editor is displayed, but testing by a second person will be great.

Screenshot/Video

Checklist

• The PR is linked to an issue and the linked issue has a Milestone, or no issue is needed
• The PR has a Milestone
• The PR template has been filled out
• The PR has been self reviewed
• The PR has a reviewer assigned
• The PR has automated tests or clear instructions for manual tests and the linked issue has appropriate QA labels, or tests are not needed
• The PR has reviewed with UX and tested in light and dark mode, or there are no UX changes

[eva-vashkevich]

lgtm.
I've checked different pages that use ResourceDetail component and they seem to work as expected