Update angular monorepo to v12.2.4

[renovate]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
@angular/common	12.2.3 -> 12.2.4
@angular/compiler	12.2.3 -> 12.2.4
@angular/compiler-cli	12.2.3 -> 12.2.4

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Release Notes

angular/angular

v12.2.4

Compare Source

12.2.4 (2021-09-01)

compiler-cli

Commit	Description
	Emit type annotations for synthesized decorator fields (#​43021)

Special Thanks:

Andrew Scott, Daniel Trevino, George Kalpakas, Joey Perrott, Kristiyan Kostadinov, nickreid and segunb

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