[Housekeeping] Copy common .github files to `.github` repository

[samhita-alla]

Describe the issue

We have .github directories across all repos under Flyte org. If we have a single .github repo under flyteorg, we can have all the common .github files under one roof.

What if we do not do this?

Maintenance

Related component(s)

No response

Are you sure this issue hasn't been raised already?

• [X] Yes

Have you read the Code of Conduct?

• [X] Yes

[kumare3]

What does this mean? Can you explain a bit more in and description

[samhita-alla]

cc: @evalsocket, @EngHabu