Revert "Bump pub to 5215714f2319d22094acc7f0feeec4a4cb1c4c34"

This reverts commit a74050ecb1.

Reason for revert: Broke some tests. Will investigate

Original change's description:
> Bump pub to 5215714f2319d22094acc7f0feeec4a4cb1c4c34
>
> Changes:
> ```
> > git log --format="%C(auto) %h %s" f7f1891..5215714
>  https://dart.googlesource.com/pub.git/+/5215714f2 Bump analyzer from 8.4.0 to 9.0.0 (4709)
>  https://dart.googlesource.com/pub.git/+/28791d3fe Bump actions/stale from 9.1.0 to 10.0.0 in the github-actions group (4686)
>  https://dart.googlesource.com/pub.git/+/bd89adfcf feat: Add --ignore-warnings flag to pub publish --dry-run (4698)
>  https://dart.googlesource.com/pub.git/+/8a6c0677a Don't attempt to fetch advisories when --offline (4697)
>  https://dart.googlesource.com/pub.git/+/bda151fc9 Bump analyzer from 8.3.0 to 8.4.0 (4693)
>  https://dart.googlesource.com/pub.git/+/b52f176e7 Bump analyzer from 8.2.0 to 8.3.0 (4689)
>  https://dart.googlesource.com/pub.git/+/4e68fd984 Workspaces glob support (4680)
>  https://dart.googlesource.com/pub.git/+/acf54b8d1 Give sdk tagging action write permissions (4688)
>  https://dart.googlesource.com/pub.git/+/c6695f8d2 Refactor/login (4583)
>  https://dart.googlesource.com/pub.git/+/ba02edbd3 Merge pull request 4685 from sigurdm/merge-cp_example
>  https://dart.googlesource.com/pub.git/+/58668b7e2 Merge remote-tracking branch 'origin/cp_example' into merge-cp_example
>  https://dart.googlesource.com/pub.git/+/52f512315 Handle all examples in workspace with flag `--example` (4679)
>
> ```
>
> Diff: https://dart.googlesource.com/pub.git/+/f7f1891e2de3d795532f45ec214f88ac912ffcd6..5215714f2319d22094acc7f0feeec4a4cb1c4c34/
> Change-Id: I34d6c0d1a7b9c17bcfafe7609e46b71253f2eb4b
> Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/461823
> Commit-Queue: Sigurd Meldgaard <sigurdm@google.com>
> Reviewed-by: Sarah Zakarias <zarah@google.com>

No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Change-Id: Ic64d4011876753202e44810e4ab05e03eefc5471
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/462680
Bot-Commit: Rubber Stamper <rubber-stamper@appspot.gserviceaccount.com>
Commit-Queue: Sarah Zakarias <zarah@google.com>
Reviewed-by: Sarah Zakarias <zarah@google.com>
Auto-Submit: Sigurd Meldgaard <sigurdm@google.com>

CHANGELOG.md

@@ -27,33 +27,6 @@
 
 [#61550]: https://github.com/dart-lang/sdk/issues/61550
 
-### Tools
-
-#### Pub
-
-- "Glob" support for pub workspaces.
-
-  Now to include all packages inside `pkgs/` in the workspace, simply write:
-
-  ```yaml
-  workspace:
-    - pkgs/*
-  ```
-
-  Supported if the dart sdk constraint of the containing package is 3.11.0 or
-  higher.
-
-- New commmand `dart pub cache gc` for reclaiming disk space from your pub
-  cache.
-
-  It works by removing  packages from your pub cache that are not referenced by
-  any of your current projects.
-
-- New flag `dart pub publish --dry-run --ignore-warnings`
-
-  Given this flag, `dart pub publish --dry-run` will only exit non-zero if your
-  project validation has errors.
-
 ## 3.10.0
 
 **Released on:** 2025-11-12

DEPS

@@ -142,7 +142,7 @@ vars = {
   "material_color_utilities_rev": "799b6ba2f3f1c28c67cc7e0b4f18e0c7d7f3c03e",
   "native_rev": "3ec573500f743d4a1393f7802143aef50fec0a47", # rolled manually while native assets are experimental
   "protobuf_rev": "1ebb09ccb5f937017e27f0953391ba856bbb8f49",
-  "pub_rev": "5215714f2319d22094acc7f0feeec4a4cb1c4c34", # rolled manually
+  "pub_rev": "f7f1891e2de3d795532f45ec214f88ac912ffcd6", # rolled manually
   "shelf_rev": "b924de80e122d1e17b1132bedb02ddb1445b337c",
   "sync_http_rev": "6666fff944221891182e1f80bf56569338164d72",
   "tar_rev": "13479f7c2a18f499e840ad470cfcca8c579f6909",