[google_maps_flutter_web] Port e2e tests to integration_test package.

[ditman]

Description

e2e is now integration_test.

Move the e2e tests on this package to be integration_tests, also ensure we depend on integration_test from path.

Related Issues

• Rename e2e -> integration_test #2918

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Breaking Change

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[dnfield]

LGTM.

The plugin_tools package still uses e2e.dart as a heuristic, but it's not used here.