build: build packages with Ivy

[brandonroberts]

PR Checklist

Please check if your PR fulfills the following requirements:

• The commit message follows our guidelines: https://github.com/ngrx/platform/blob/master/CONTRIBUTING.md#commit
• Tests for the changes have been added (for bug fixes / features)
• Documentation has been added / updated (for bug fixes / features)

PR Type

What kind of change does this PR introduce?

[ ] Bugfix
[ ] Feature
[ ] Code style update (formatting, local variables)
[ ] Refactoring (no functional changes, no api changes)
[x] Build related changes
[ ] CI related changes
[ ] Documentation content changes
[ ] Other... Please describe:

What is the current behavior?

Closes #

What is the new behavior?

Builds NgRx packages with Ivy and partial compilation mode, and bumps package versions to start beta testing.

Does this PR introduce a breaking change?

[x] Yes
[ ] No

BREAKING CHANGES:

Minimum version required for Angular and RxJS has been updated

BEFORE:

Angular 12.x is minimum version
RxJS 6.5.x is minimum required version

AFTER:

Angular 13.0.0-RC.0 is minimum version
RxJS 7.4.x is minimum required version

Other information

We can't upgrade to V13 packages yet because #3184 is still blocked on jest-preset-angular supporting Angular V13 RCs.

[ngrxbot]

Preview docs changes for 2ff5600 at https://previews.ngrx.io/pr3219-2ff56004/

[markostanimirovic]

👆 accidentally reviewed it from the account I use for work.