Bump pub to 710265bae23ad5860f33287fba10b5c369f19a93

Changes:
```
> git log --format="%C(auto) %h %s" 58de642..710265b
 https://dart.googlesource.com/pub.git/+/710265ba Cache canonicalized version of paths in path dependencies (4495)
 https://dart.googlesource.com/pub.git/+/eaf03b33 Handle git dependencies with relative pub cache (4494)
 https://dart.googlesource.com/pub.git/+/6a101042 Upgrade dependencies (4492)
 https://dart.googlesource.com/pub.git/+/00f9cd4b Bump source_span from 1.10.0 to 1.10.1 (4480)
 https://dart.googlesource.com/pub.git/+/aaebe149 Use entrypoint.workPackage instead of rootpackage when global-activating from path (4485)
 https://dart.googlesource.com/pub.git/+/e617ca94 Bump test_descriptor from 2.0.1 to 2.0.2 (4482)
 https://dart.googlesource.com/pub.git/+/842431e2 Bump yaml from 3.1.2 to 3.1.3 (4481)
 https://dart.googlesource.com/pub.git/+/97e546fb Update `add` helping messages (4472)
 https://dart.googlesource.com/pub.git/+/a32d5f43 Bump convert from 3.1.1 to 3.1.2 (4451)
 https://dart.googlesource.com/pub.git/+/58a5da5e Bump meta from 1.15.0 to 1.16.0 (4450)
 https://dart.googlesource.com/pub.git/+/2c211b09 Bump test from 1.25.8 to 1.25.14 (4477)

```

Diff: https://dart.googlesource.com/pub.git/+/58de642dc1d07601f6eb2b4ecd94555c0210106b..710265bae23ad5860f33287fba10b5c369f19a93/
Change-Id: Id6d668cbf092bd333ed3abbb0ec1d047d58c0f7e
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/405040
Commit-Queue: Sigurd Meldgaard <[email protected]>
Reviewed-by: Sarah Zakarias <[email protected]>

DEPS

@@ -143,7 +143,7 @@ vars = {
   # dart-native-interop-team@ is rolling breaking changes manually while the assets features are in experimental.
   "native_rev": "ba34674d97ffe612a3df782e1695dab4e5010e66", # disable tools/rev_sdk_deps.dart
   "protobuf_rev": "b7dd58cdbd879beee4c3fbf8ee80fce8e97bad26",
-  "pub_rev": "58de642dc1d07601f6eb2b4ecd94555c0210106b", # disable tools/rev_sdk_deps.dart
+  "pub_rev": "710265bae23ad5860f33287fba10b5c369f19a93", # disable tools/rev_sdk_deps.dart
   "shelf_rev": "bf799519cda2898a7c5af06dcfdd5fe6443afd79",
   "sync_http_rev": "47e6b264a209d0d806cfe9cdad8b6c69ce231986",
   "tar_rev": "5a1ea943e70cdf3fa5e1102cdbb9418bd9b4b81a",