[ci] Update web mocks.

[ditman]

This PR updates the mockito mocks of the following web packages:

• google_maps_flutter_web
• url_launcher_web
• webview_flutter_web (these had been manually modified to land a roll a while back)

Fixes flutter/flutter#97815

Pre-launch Checklist

• I read the Contributor Guide and followed the process outlined there for submitting PRs.
• I read the Tree Hygiene wiki page, which explains my responsibilities.
• I read and followed the relevant style guides and ran the auto-formatter. (Unlike the flutter/flutter repo, the flutter/plugins repo does use dart format.)
• I signed the CLA.
• The title of the PR starts with the name of the plugin surrounded by square brackets, e.g. [shared_preferences]
• I listed at least one issue that this PR fixes in the description above.
• I updated pubspec.yaml with an appropriate new version according to the pub versioning philosophy, or this PR is exempt from version changes.
• I updated CHANGELOG.md to add a description of the change, following repository CHANGELOG style.
• I updated/added relevant documentation (doc comments with ///).
• I added new tests to check the change I am making, or this PR is test-exempt.
• All existing and new tests are passing.

If you need help, consider asking for advice on the #hackers-new channel on Discord.

[ditman]

�[36m[0:00] Running for google_maps_flutter_web...�[0m
  No version change.
  Found NEXT; validating next version in the CHANGELOG.
�[31mNo CHANGELOG change found. If this PR needs an exemption from the standard policy of listing all changes in the CHANGELOG, comment in the PR to explain why the PR is exempt, and add (or ask your reviewer to add) the "override: no changelog needed" label. Otherwise, please add a NEXT entry in the CHANGELOG as described in the contributing guide.�[0m
�[36m[0:00] Running for url_launcher_web...�[0m
  No version change.
  Found NEXT; validating next version in the CHANGELOG.
�[31mNo CHANGELOG change found. If this PR needs an exemption from the standard policy of listing all changes in the CHANGELOG, comment in the PR to explain why the PR is exempt, and add (or ask your reviewer to add) the "override: no changelog needed" label. Otherwise, please add a NEXT entry in the CHANGELOG as described in the contributing guide.�[0m

This is only updating mock files in google_maps_flutter_web and url_launcher_web tests, I don't think this warrants a changelog entry.

�[36m[0:00] Running for webview_flutter_web...�[0m
  No version change.
  Found NEXT; validating next version in the CHANGELOG.
�[31mNo version change found, but the change to this package could not be verified to be exempt from version changes according to repository policy. If this is a false positive, please comment in the PR to explain why the PR is exempt, and add (or ask your reviewer to add) the "override: no versioning needed" label.�[0m

I think removing some build_tool dependencies from the pubspec.yaml triggered the versioning alert for webview_flutter_web. I don't think this change warrants a new version.

[flutter-dashboard]

It looks like this pull request may not have tests. Please make sure to add tests before merging. If you need an exemption to this rule, contact Hixie on the #hackers channel in Chat (don't just cc him here, he won't see it! He's on Discord!).

If you are not sure if you need tests, consider this rule of thumb: the purpose of a test is to make sure someone doesn't accidentally revert the fix. Ask yourself, is there anything in your PR that you feel it is important we not accidentally revert back to how it was before your fix?

Reviewers: Read the Tree Hygiene page and make sure this patch meets those guidelines before LGTMing.

[ditman]

Removing "needs tests" since this PR is updating the mocks used to run in CI.

[stuartmorgan-g]

This is only updating mock files in google_maps_flutter_web and url_launcher_web tests, I don't think this warrants a changelog entry.
..
I think removing some build_tool dependencies from the pubspec.yaml triggered the versioning alert for webview_flutter_web. I don't think this change warrants a new version.

Yep, flutter/flutter#103602 is tracking making this check understand dev_dependencies.

[stuartmorgan-g]

LGTM!