Roll quiver to 3.2.1

[mit-mit]

Replace this paragraph with a description of what this PR is changing or adding, and why. Consider including before/after screenshots.

List which issues are fixed by this PR. You must list at least one issue.

Need to roll quiver to a version that doesn't depend on BidirectionalIterator, which is being removed in https://dart-review.googlesource.com/c/sdk/+/276741?tab=checks.

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[mit-mit]

cc @lrhn

[yjbanov]

We might need @cbracken's and/or @Hixie's help to figure out what to do about the NOTICE file.

[mit-mit]

Replaced by #38617