[10.x] chore(deps): Metro to 0.73.9 (Windows/Linux watcher fixes)

[robhogan]

Summary:

Metro 0.73.9 addresses a regression whereby directories created while Metro was running were not watched for changes, on Windows and Linux, if not using Watchman. This affects React Native 0.71.1-0.71.4 via the CLI.

This fix is earmarked for inclusion in RN 0.71.5, so a new point release of 10.x would be appreciated! Thanks again.

Test Plan:

• New regression tests in Metro for this bug
• Manually tested in an RN app on Windows
• No issues reported by users who forced their metro-file-map to 0.76.0, as we recommended as a workaround - this hotfix brings essentially the same update.
• Local changes in the CLI generated by yarn

[thymikee]

Thanks!

[thymikee]

Released 10.2.2 for the affected packages:

 - @react-native-community/cli-doctor@10.2.2
 - @react-native-community/cli-plugin-metro@10.2.2
 - @react-native-community/cli@10.2.2