Connect: Remove proprietary imports from OSS build

[ravicious]

• Make sure the OSS build of Connect compiles.
• Make sure yarn storybook works without fetching webapps.e first.
• Add a step to CI which builds the OSS version of Connect.
  • This should be done in addition to building the enterprise version to ensure that both versions build successfully.

Ever since we added support for access requests (gravitational/webapps#1203), the OSS build of Connect has been broken. The app now unconditionally imports proprietary code which is not available for OSS users.

The temporary solution is to remove any imports that require code from e-teleterm and e-teleport. To do this, clone ravicious/connect-oss-workaround (#21794) and rebase it on top of master.

[ravicious]

@avatus @gzdunek Here's my plan on how to fix the OSS build of Connect. Please leave any comments under the gist. I had to submit it as a gist instead of a comment here because of how GitHub handles Markdown in files vs comments. 🙄

[ravicious]

I have to pause this work, we might come back to this issue by the end of April.

[gzdunek]

For posterity: instead of adding Connect Enterprise entry point (and increasing the project complexity), we decided to move the shared part of access requests UI to OSS.
Slack discussion https://gravitational.slack.com/archives/C02DQ1C2BMW/p1712927997067419