Migrate Google's devsite-plugin to analysis-kotlin-api

[IgnatBeresnev]

Dokka 1.9.0 introduces some breaking changes that affect the plugin that builds Android's API reference docs.

This plugin uses significantly more compiler internals than any other Dokka plugin, so we need to provide stable alternatives for the now-missing API, and help with migration where possible.

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Definition of done: dokka-devsite-plugin has migrated to analysis-kotlin-api, and no regression was noticed.