test(package_info_plus): run integration tests

[blaugold]

Description

Move disabled web specific unit tests to integration tests and start running them together with existing integration tests. This is easier than using flutter test --platform chrome. --platform does not seem to be official supported anyway.

Related Issues

Replace this paragraph with a list of issues related to this PR from the issue database. Indicate, which of these issues are resolved or fixed by this PR.

e.g.

• Fix Small PR fixing dart format on android_alarm_manager_plus #123
• Related [package_info_plus] Web: fail to get PackageInfo (version) offline #456

Checklist

• I read the Contributor Guide and followed the process outlined there for submitting PRs.
• I titled the PR using Conventional Commits.
• I did not modify the CHANGELOG.md nor the pubspec.yaml files.
• All existing and new tests are passing.
• The analyzer (flutter analyze) does not report any problems on my PR.

Breaking Change

Does your PR require plugin users to manually update their apps to accommodate your change?

• Yes, this is a breaking change (please indicate that with a ! in the title as explained in Conventional Commits).
• No, this is not a breaking change.

[blaugold]

@vbuberen Hey :) Not sure who to ping to get a review on this PR. The motivation for this change is to be able to add the tests that were requested for #1330.

[vbuberen]

You are just in time with your ping as I am doing some changes to do another release in nearest days.

[vbuberen]

Thanks for your contribution.