Bump pub to 4bd757ce1dad04035fb0dbc6156879af23d8b3b8

This includes all the changes reverted in https://dart-review.googlesource.com/c/sdk/+/289062

This also contains `https://dart.googlesource.com/pub.git/+/c939e81f Fix issue with _ in package names in dart add (3838)` fixing the reason for the revert.

Changes:
```
> git log --format="%C(auto) %h %s" 048e3ad..4bd757c
 https://dart.googlesource.com/pub.git/+/4bd757ce Handle http errors gracefully when downloading archive (3811)
 https://dart.googlesource.com/pub.git/+/c939e81f Fix issue with _ in package names in dart add (3838)
 https://dart.googlesource.com/pub.git/+/9df0fddf Lazy construction of cache path. (3837)
 https://dart.googlesource.com/pub.git/+/554b3c32 Lazy loading of pubspec.yaml from entrypoint (3835)
 https://dart.googlesource.com/pub.git/+/cfaec21f Remove support for legacy credentials file (3824)
 https://dart.googlesource.com/pub.git/+/142baa3a Remove the exported deprecatedpubCommand (3825)
 https://dart.googlesource.com/pub.git/+/719afcf4 Remove obsolete TODO. (3827)
 https://dart.googlesource.com/pub.git/+/80d3e0d6 Remove obsolete tests (for features) (3834)
 https://dart.googlesource.com/pub.git/+/09eb6125 Remove barback, build and serve commands (3833)
 https://dart.googlesource.com/pub.git/+/e2e740ca Remove command list-package-dirs (3832)
 https://dart.googlesource.com/pub.git/+/6db5faa2 Remove support for PUB_CACHE in APPDATA on windows (3831)
 https://dart.googlesource.com/pub.git/+/a7a74857 Don't ignore a folder called 'packages' when publishing (3828)
 https://dart.googlesource.com/pub.git/+/70bfc022 Remove support for .pub package-local cache (3823)
 https://dart.googlesource.com/pub.git/+/4cd7a0a5 Use local variable for buffer (3826)
 https://dart.googlesource.com/pub.git/+/397e245e Remove obsolete TODO. (3821)
 https://dart.googlesource.com/pub.git/+/17ec4652 Handle malformatted content-hashes in cache, version listing or pubspec.lock (3818)
 https://dart.googlesource.com/pub.git/+/49c682c7 Add workflow to close need-info issues with responses. (3817)
 https://dart.googlesource.com/pub.git/+/bcb5ce18 Fix wrong action when executing git command (3814)
 https://dart.googlesource.com/pub.git/+/086c2d12 Larger size limit for caching package listings (3815)
 https://dart.googlesource.com/pub.git/+/94b43d05 remove an extra period from a publish message (3812)
 https://dart.googlesource.com/pub.git/+/d69493e5 Don't allow non-null-safety constraints in the root pubspec (3800)
 https://dart.googlesource.com/pub.git/+/3514d7e7 Fail gracefully when tar file contains duplicate entries (3805)
 https://dart.googlesource.com/pub.git/+/0b3b8b44 Give full error even in summary mode (3804)
 https://dart.googlesource.com/pub.git/+/09c29722 Allow adding and removing dependency overrides (3716)
 https://dart.googlesource.com/pub.git/+/7184d1b5 accept 'topics' property in pubspec.yaml (3796)
 https://dart.googlesource.com/pub.git/+/cd106dfd Improve usage text of get (3792)
 https://dart.googlesource.com/pub.git/+/019d61cb Handle bad git revisions (3791)
 https://dart.googlesource.com/pub.git/+/e3ff7a99 Use 'pkg' and 'packages' to trigger suggestions for the pub command (3731)
 https://dart.googlesource.com/pub.git/+/ea24bf22 Better error when path dependency has no pubspec.yaml (3787)
 https://dart.googlesource.com/pub.git/+/da2a0144 Drop --use-data-isolate-strategy flag for tests (3788)
 https://dart.googlesource.com/pub.git/+/a565858e Improve documentation of `pub token` and subcommands (3778)
 https://dart.googlesource.com/pub.git/+/dd320459 Add test for publishing and consuming files with unicode characters in name (3785)
 https://dart.googlesource.com/pub.git/+/c4226d9f Fail tests on errors thrown by test PackageServer (3784)
 https://dart.googlesource.com/pub.git/+/12019939 Consider pubspec_overrides.yaml when publishing (3782)
 https://dart.googlesource.com/pub.git/+/d8a97497 Allow addition of tokens for insecure localhost repositories (3777)

```

Diff: https://dart.googlesource.com/pub.git/+/048e3ad2b5e1b4ebe6883addbc95722be6904a7b..4bd757ce1dad04035fb0dbc6156879af23d8b3b8/
Change-Id: I67babf094b7cc4152c5c4ccc4b3e536634a57fc2
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/289201
Commit-Queue: Sigurd Meldgaard <sigurdm@google.com>
Reviewed-by: William Hesse <whesse@google.com>

DEPS

@@ -156,7 +156,7 @@ vars = {
   "path_rev": "24b58a2499440cc3d12d2b3c2f52b95f91ff1c0a",
   "pool_rev": "694cfd867d8d84857fc42a8d07933013f0d25305",
   "protobuf_rev": "75bc380a6e9601565606a13dee16c5ab2bf5019c",
-  "pub_rev": "048e3ad2b5e1b4ebe6883addbc95722be6904a7b", # disable rev_sdk_deps.dart
+  "pub_rev": "4bd757ce1dad04035fb0dbc6156879af23d8b3b8", # disable rev_sdk_deps.dart
   "pub_semver_rev": "c0e6ea74ccfbfdb2ef54c7cd9ad31455ca8e481f",
   "shelf_rev": "e3cfe796ad478cb4b61ad8e68ea29644c0bb1037",
   "source_map_stack_trace_rev": "45ea3688b6bec1eb565c38c4e28f37b01f8a0fa9",

tools/bots/pub_integration_test.py

@@ -12,7 +12,7 @@ import tempfile
 
 PUBSPEC = """name: pub_integration_test
 environment:
-  sdk: '>=2.10.0 <=3.0.0'
+  sdk: '^2.19.0'
 dependencies:
   shelf:
   test: