Bump http to 73b0b1c9ef2964c4619fd23068b8f60292e902c6

Changes:
```
> git log --format="%C(auto) %h %s" f0a02f9..73b0b1c
 https://dart.googlesource.com/http.git/+/73b0b1c Bump actions/labeler from 4.3.0 to 5.0.0 (1096)
 https://dart.googlesource.com/http.git/+/15ec3ba Prepare to publish `package:cronet_http` as 1.0.0 (1087)
 https://dart.googlesource.com/http.git/+/26e55c3 cronet_http: require android API level 28 (1088)
 https://dart.googlesource.com/http.git/+/b10f448 [cronet_http] Enables CI for `cronet_http_embedded` (1070)
 https://dart.googlesource.com/http.git/+/a5b8eec Prepare to publish cupertino 1.2.0 (1080)
 https://dart.googlesource.com/http.git/+/c114aa0 Add a fake response for PNG images (1081)
 https://dart.googlesource.com/http.git/+/db2cb76 Run web tests with wasm with dev Dart sdk (1078)
 https://dart.googlesource.com/http.git/+/36f98e9 Fix a bug where BrowserClient was listed as requiring Flutter (1077)
 https://dart.googlesource.com/http.git/+/db7f165 Provide an example of configuring IOClient with an HttpClient. (1074)
 https://dart.googlesource.com/http.git/+/cd748b6 Document that runWithClient must be called for every isolate (1069)
 https://dart.googlesource.com/http.git/+/f585947 Test persistentConnection with large request bodies (984)
 https://dart.googlesource.com/http.git/+/7c05dde Add documentation for "no_default_http_client" (1068)
 https://dart.googlesource.com/http.git/+/d8983fa Add support for setting headers for all requests (1060)
 https://dart.googlesource.com/http.git/+/c90496e Document how to use replacement `Client` implementations (1063)
 https://dart.googlesource.com/http.git/+/c8536e4 [http_client_conformance_tests] Updates to support wasm compilation (1064)
 https://dart.googlesource.com/http.git/+/5dd5140 Bump actions/setup-java from 3 to 4 (1065)
 https://dart.googlesource.com/http.git/+/064f510 misc cleanup of yaml files (1061)
 https://dart.googlesource.com/http.git/+/22f52e2 Update pubspec.yaml to 0.4.2 (1059)
 https://dart.googlesource.com/http.git/+/40a46d8 Fix a bug where cronet_http sends incorrect HTTP request methods (1058)
 https://dart.googlesource.com/http.git/+/c125ed5 [http] Allow pkg:web v0.3.0 (1055)
 https://dart.googlesource.com/http.git/+/9fb4cfa Update lints to latest, etc (1048)
 https://dart.googlesource.com/http.git/+/5e84d9f Update platform-specific imports for wasm (1051)
 https://dart.googlesource.com/http.git/+/8c9feb5 [http] Fix type cast for dart2wasm (1050)
 https://dart.googlesource.com/http.git/+/a2f0b25 [http] use pkg:web, require Dart 3.2 (1049)

```

Diff: https://dart.googlesource.com/http.git/+/f0a02f98f7c921e86ecc81c70f38bb6fbccc81b9..73b0b1c9ef2964c4619fd23068b8f60292e902c6/
Change-Id: Id9e8032411f3c34bb2bdc0c22af35da6f2e34a88
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/344320
Reviewed-by: Nate Bosch <nbosch@google.com>
Commit-Queue: Devon Carew <devoncarew@google.com>

DEPS

@@ -149,7 +149,7 @@ vars = {
   "flute_rev": "f42b09f77132210499ec8ed819a60c260af03db6",
   "glob_rev": "7c9a121e92687b7ac6456ec0796eb1e5c0373d90",
   "html_rev": "06bc148600b1d1a70f2256bdf788c213f1f60f55",
-  "http_rev": "f0a02f98f7c921e86ecc81c70f38bb6fbccc81b9", # https://github.com/dart-lang/sdk/issues/54165
+  "http_rev": "73b0b1c9ef2964c4619fd23068b8f60292e902c6",
   "http_multi_server_rev": "ae484896624cee8b0a8a97a0fb1ea323c4c3d31f",
   "http_parser_rev": "224c1a9d24b46c7a9da1f09147e0e1fbda78089d",
   "intl_rev": "5d65e3808ce40e6282e40881492607df4e35669f",