Fix Windows tests

[jasagredo]

• fixes the local+noindex uri in withRepo which enables many tests on Windows (just a matter of \\ -> /)
• normalizes some more output on Windows (\\ -> / but also removing C:\\)
• provide skip*IO functions on IO () to quickly discard tests without having to setup a test env
• un-skip and fix a bunch of tests here and there

55 tests in total which were skipped or expected broken on Windows now are passing:

➜ diff \
    <(rg -v "SKIP no cabal-install \(" code/cabal/out.txt | rg "(known|SKIP)" | awk '{print $1}' | sort -u) \
    <(rg -v "SKIP no cabal-install \(" master.out | rg "SKIP" | awk '{print $1}' | sort -u) \
    | rg "^>" | wc -l
55

and 66-55=11 tests were previously being skipped and now are marked as known failure, with an issue number:

➜ diff \
    <(rg -v "SKIP no cabal-install \(" code/cabal/out.txt | rg "SKIP" | awk '{print $1}' | sort -u) \
    <(rg -v "SKIP no cabal-install \(" master.out | rg "SKIP" | awk '{print $1}' | sort -u) \
    | rg "^>" | wc -l
66

[mpickering]

If CI works, then this looks good to me.

[Mikolaj]

Thank you for so much clarity and information for the future self and future us.

[jasagredo]

Thanks for the rebase(s) @Mikolaj 😄

[geekosaur]

@mergify backport 3.12

[mergify]

backport 3.12

✅ Backports have been created

• #10211 Fix Windows tests (backport #10186) has been created for branch 3.12 but encountered conflicts

[ulysses4ever]

Perhaps, this PR should have been squashed?..

[jasagredo]

Yeah, perhaps...