feat: document_overrides quirk to patch invalid OIDD files

[paulswartz]

I don't love this as a bulk override, but it seems easier than needing to add a specific quirk for each attribute that it's possible for an OP to get wrong?

[maennchen]

That’s quite a good idea. It works for the grant types and also for the issuer mismatch. Not for the https exception though.

This will probably keep us from having to add a lot of quirks in the long run.

If we go down this route, we should deprecate the issuer mismatch and revert #304.

[coveralls]

Pull Request Test Coverage Report for Build 103

• 7 of 7 (100.0%) changed or added relevant lines in 3 files are covered.
• 1 unchanged line in 1 file lost coverage.
• Overall coverage decreased (-0.2%) to 94.051%

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Files with Coverage Reduction	New Missed Lines	%
src/oidcc_authorization.erl	1	89.86%

Totals
Change from base Build 135:	-0.2%
Covered Lines:	743
Relevant Lines:	790

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💛 - Coveralls