Revert "Disable flaky tests for now (#11821)"

[weihanglo]

What does this PR try to resolve?

This reverts commit c890c64.

gix was updated to 0.41.0 (and later) a while back. Let's see how it goes.

resolves #11821

How should we test and review this PR?

Wait a see if those tests are still flaky in CI.

[rustbot]

r? @ehuss

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[weihanglo]

Okay. It seems that we have a different issue on Windows today. I don't have energy to work on it at this time. Closing.

1   1         Updating git repository `[https://foo.bar/foo/bar`](https://foo.bar/foo/bar%60)
    2    +warning: auto-detection of host provider took too long (>2000ms)
    3    +warning: see https://aka.ms/gcm/autodetect for more information.
    4    +fatal: A task was canceled.
    5    +warning: auto-detection of host provider took too long (>2000ms)
    6    +warning: see https://aka.ms/gcm/autodetect for more information.