fix: Allow starting recurring meetings without GCal

[Dschoordsch]

Description

We were hiding the schedule button when no GCal integration was available on the instance. This is wrong in some cases when the dialog still allows to set up recurrence.
This PR also addresses a small title mismatch discovered by @garethaledavies which claimed recurring meetings when the option was not available.

Fixes #9913 #9777

Demo

https://www.loom.com/share/fda8dcea642949f698d37962fab216b6?sid=a2acbf99-6e62-4a0d-becb-f63a9da21b96

Testing scenarios

• with GCal integration provider (after yarn build && yarn predeploy) test the schedule dialog in
  • poker and checkin show only the GCal options
  • retro and team prompt show GCal and recurrence options
• remove the global GCal integration provider and test the schedule button again
  • poker and checkin do not show one
  • team prompt and retro only show the recurrence options

Final checklist

• I checked the code review guidelines
• I have added Metrics Representative as reviewer(s) if my PR invovles metrics/data/analytics related changes
• I have performed a self-review of my code, the same way I'd do it for any other team member
• I have tested all cases I listed in the testing scenarios and I haven't found any issues or regressions
• Whenever I took a non-obvious choice I added a comment explaining why I did it this way
• I added the label Skip Maintainer Review Indicating the PR only requires reviewer review and can be merged right after it's approved if the PR introduces only minor changes, does not contain any architectural changes or does not introduce any new patterns and I think one review is sufficient'
• PR title is human readable and could be used in changelog