Allow using Github App Token

[Shahaed]

A token from a Github App can have the same permissions as an admin PAT and is probably more appropriate to use than a PAT. (Github App tokens can be gotten this way: https://github.com/tibdex/github-app-token).

This action currently doesn't support tokens from a Github App (even with the correct permissions) because this line:

push-protected/push_action/utils.py

Line 292 in 035cda7

IN_MEMORY_CACHE[cache_name] = response["permissions"].get(role.value, False)

checks for the admin property in the permission object in the response which a Github App can't have be true.

I think the easiest way to do this would be by removing the admin check and if someone is using a token with insufficient permissions, fail at that specific api.

[CasperWA]

@Shahaed do you have a possibility to test out the currently open PR? It can be tested by changing the version of the action to instead point to cwa/close-144-allow-app-tokens:

uses: CasperWA/push-protected@cwa/close-144-allow-app-tokens
with:
  token: ...