Add required copyright headers to files missing it

[Dcallies]

Summary

The internal linter is complaining again, so do a fixup. There were a couple of tricky cases

1. jinja template files, which I chose to implement via {# Comment #}
2. A section of vpdq declared in the public domain in [vpdq] Upgrade Python binding to modern build system #1508. I am not a lawyer, so I tried to pick a compromise solution, @ianwal seems to have left github so can't ask him his opinion.

Test Plan

Let's see if CI is happy, and then I'll just view the HMA UI to make sure it still loads

[Dcallies]

Well @ianwal, seems like you can like comments, but your profile and all previous PRs are hidden!

[ianwal]

Well @ianwal, seems like you can like comments, but your profile and all previous PRs are hidden!

I think my account is suspended because I can't search any code either 🫤. No clue why.

I don't see any compatibility problems with the changes vpdq license and a note about the public domain, from what I researched before (I'm also not a lawyer).

Update:
They flagged my account for spam but I contacted them and was able to get it removed. They said it just happens sometimes 🫤.