refactor: replace deferred with rxjs #13507

Job	Run time
[Required] Inspect code	2m 7s
check-changes / Check which packages changed	4s
Deploy docs (if needed)	0s
[Required] Docker image test	1m 40s
chrome-headless (1-2) on ubuntu-latest	2m 1s
Doctest	0s
chrome-headless (2-2) on ubuntu-latest	2m 33s
chrome-headless-shell (1-2) on ubuntu-latest	1m 49s
chrome-headless-shell (2-2) on ubuntu-latest	1m 51s
chrome-bidi (1-2) on ubuntu-latest	2m 34s
npm installation on ubuntu-latest	3m 41s
chrome-bidi (2-2) on ubuntu-latest	2m 54s
[Required] Angular Schematics tests	0s
firefox-bidi (1-4) on ubuntu-latest	3m 24s
[Required] Puppeteer Unit tests	40s
firefox-bidi (2-4) on ubuntu-latest	2m 28s
firefox-bidi (3-4) on ubuntu-latest	2m 3s
Browsers tests on ${{ matrix.os }}	0s
Angular Schematics smoke tests on ${{ matrix.os }}	0s
firefox-bidi (4-4) on ubuntu-latest	5m 28s
firefox-headful (1-4) on ubuntu-latest	2m 56s
firefox-headful (2-4) on ubuntu-latest	2m 46s
firefox-headful (3-4) on ubuntu-latest	2m 7s
firefox-headful (4-4) on ubuntu-latest	4m 37s
firefox-headless (1-4) on ubuntu-latest	2m 51s
firefox-headless (2-4) on ubuntu-latest	2m 41s
firefox-headless (3-4) on ubuntu-latest	2m 15s
firefox-headless (4-4) on ubuntu-latest	4m 31s
[Required] Test the browsers packages	1s
[Required] Angular Schematics smoke tests	1s
[Required] Chrome tests	1s
[Required] Installation tests	1s
[Required] Firefox tests	1s
	1h 0m 6s

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