add a script to verify PRR has all the sections

[kannon92]

• One-line PR description: Add a script to verify PRR template.

• Issue link:

• Other comments:

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[pohly]

Didn't we already have such a proposal before? I'm not sure anymore and a quick search didn't find it.

[kannon92]

Didn't we already have such a proposal before? I'm not sure anymore and a quick search didn't find it.

I haven't heard anything concrete.

The one I heard about was the move the KEP issue metadata to the KEP but we never acted on that.