Improved session player navigation

[paolodamico]

Changes

• Updates the way the session player is opened to be shown in the same page to provide a smoother experience.

  Default behavior. In place player
  

  Cmd/Cntrl + click. Open in new tab
  

• Removes the legacy drawer (and related feature flag [full-page-player]).

• Removes standalone session player page on /sessions/play?id={id} because it's redundant now with /sessions?sessionRecordingId={id}

• Fixes some TS bugs in session recording.

Checklist

• All querysets/queries filter by Organization, by Team, and by User
• Django backend tests
• Jest frontend tests
• Cypress end-to-end tests

[macobo]

Feedback:

• ESC to exit is sweet! Nice feature!
• It also doesn't reload the sessions page - good job!
• It feels smooth to use!

Issues:

• Drawer shows up with a scroll bar for me
• I think there's some dead code now under frontend/src/scenes/sessions/sessionsTableLogic.ts
• Looking at the network tab I see two requests - is session data being fetched twice?
• Viewing the player from under persons page failed: https://posthog-session-player--8y8jnq.herokuapp.com/person/176234d4bea17-045fe1c8c0a417-3a7b035f-1fa400-176234d4beb53e . I think it has to do with the sessionPlayerUrl code?

TypeError: Cannot read property 'timestamp' of undefined
    at vt.getDuration (index.modern.js:252)
    at $t (SessionsPlay.tsx:130)

[paolodamico]

@macobo thanks for the thorough review, great catches! I've addressed all your feedback and greatly simplified the logic of sessionsTable, please feel free to review again

[macobo]

Awesome! I'd merge this and make a PR for the scroll bar issue but merging the other pr caused a merge conflict 😅