Framework: Update dotnet 6.0 exclusions

[mreid-tt]

Description

This is a follow-on from #5602 and adds the exclusions for alpine and alpine4k based on investigation in #5302 (comment) and #5574 (comment).

Fixes #
Closes #4528
Closes #5302
Closes #4546

Checklist

• Build rule all-supported completed successfully
• New installation of package completed successfully
• Package upgrade completed successfully (Manually install the package again)
• Package functionality was tested
• Any needed documentation is updated/created

Type of change

• Bug fix
• New Package
• Package update
• Includes small framework changes
• This change requires a documentation update (e.g. Wiki)

[mreid-tt]

@hgy59, further testing with alpine confirms incompatibility with dotnet 6 running on DSM 7.

I was wondering, given that we are updating the version of mono to v6 soon do we think this is a path to supporting the various *arr packages on older platforms? I know that Jackett for example has a mono build that is used for these older platforms but I wonder if we can do the same for the *arr packages? Would it be possible to compile a mono build for them?

[hgy59]

So finally are the only 32 bit ARM archs with support for dotnet armada375 and armada38x ?
If so, I doubt that it is worth to do all this work for exclusion.

We could simply declare ARMv7 (the generic one) as unsupported and create dedicated packages for the two remaining archs.

Or we use ARMv7 for the packages with mono dependency and exluce armada375 and armada38x in this generic package (we have the Makefile variable REMOVE_FROM_GENERIC_ARCHS to do so).

[mreid-tt]

Checking the earlier tests we have support for armada375, armada38x, armadaxp and monaco under DSM 7. I don't know if this changes things.

EDIT: I think that comcerto2k should be supported as well but I know that's built separately.

I was looking at the Makefile variables page and I didn't see the REMOVE_FROM_GENERIC_ARCHS variable listed.