Normalize Windows drive letters to uppercase for analysis

[DanTup]

This fixes #32095, however I'm currently unable to get the tests running locally. I'll continue to work on that, but I'm hoping that creating a PR runs all the tests on CI so we should at least get to see if this (legitimately) broke anything in the meantime?

Turns out this also fixes #32042! I can't run the latest analyzer code against a version of the SDK that the flutter_tools is happy with, however I rolled my analyzer code back to 2.0-dev.22 and repro'd this error, then applied the same changes from this PR to that version, and the errors went away.

Turns out to also fix #28895!

@bwilkerson

[DanTup]

Oh, looks like there's no CI build for the PR... I'll continue working on getting the tests running locally before this is merged!

[DanTup]

I was running the wrong tests here (analysis_server, but the change is in analyzer). Analyzer tests all pass both before/after this change:

02:46 +22943: All tests passed!

[bwilkerson]

See https://dart-review.googlesource.com/c/sdk/+/40720 for review comments.

[DanTup]

@bwilkerson

you can either click the button labeled "CQ Dry Run"

Where should that appear? I can't see it but don't know if that might be permission related (I have logged in as danny @ tuppeny...) or because you've already clicked it?

Should I be using Gerrit to raise reviews for things? If so, are there any notes on the process for raising a review once a PR is sent?

[bwilkerson]

I'll send you an e-mail where we can have a process discussion. Seems more appropriate.