Boost: Add notices to settings page when modules/settings changed

[donnchawp]

Fixes #36330

Proposed changes:

Demo

hDKvPhJCw2LMa7NRjtokh1OSErzTzNFU0XhLe6IA.mp4

• Add notices when modules are toggled or sub-settings are changed;
• Remove useEffect in minify meta;
• Update time when notifications disappear from 5 to 2 seconds.

Other information:

• Have you written new tests for your changes, if applicable?
• Have you checked the E2E test CI results, and verified that your changes do not break them?
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Jetpack product discussion

Does this pull request change what data or activity we track or use?

Testing instructions:

• Load the settings page and enable/disable modules, or change settings.

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[haqadn]

Overall looks good and works as expected. I have a few suggestions.

[haqadn]

LGTM