Prep for AngularFire v21 (#3674)

- Bump all Angular dependencies to `^21.0.0` build to `~0.2100.0`
- Bump firebase to next major
- Drop vertexai
- Lots of lint and tsconfig drama
- Unbork Github Actions

fix: Avoid handling promise rejections twice in stability helper (#3657)

`PendingTasks.run` reports rejections of the promise to the
`ErrorHandler`. This function already returns a promise that is meant to
be handled in the developer's application. If there _is_ handling there,
the rejection is handled both in the `PendingTasks.run` and in the
developer callsite.

This change updates the code to use `PendingTasks.add` instead, which
has no built in error handling mechanisms.

fixes angular/angular#61932

Preparing v20 release (#3655)

* Bump peers, bump version
* Quick fix for build:jasmine
* Remove upset test for now

Preparing v20 release (#3655)

* Bump peers, bump version
* Quick fix for build:jasmine
* Remove upset test for now

19.2.0 release (#3651)

Bump action, bump minor (#3644)

* Bump minor
* Bump upload/download artifact

zone log verbosity (#3613)

* Bunch of stuff
* Bump firebase
* Cleanup

Zone docs and switch to warnings (#3608)

* Warn rather than error, thats trippin folk

* Add doc on zone wrappers

* Words

Adding more injector safety (#3590)

* Zone wrapper noops for our other helpers
* Add a warning / error on potential Zone / hydration issues
* Pass injection context to `zoneWrapFn` 
* Pass injection context into the Promise wrapper
* `beforeAuthStateChanged` should not block

Allow use of zone wrappers outside inejection context (#3589)