feat(cli): add support for multiple sources to sync command #28680

Job	Run time
changes	23s
Lint Go code	4m 57s
Ensure Go modules synchronicity	44s
Check changes to generated code	8m 41s
Build & cache Go code	2m 59s
Build, test & lint UI code	0s
Run unit tests for Go packages	4m 16s
Run end-to-end tests (v1.29.1)	44m 47s
Run unit tests with -race for Go packages	7m 48s
Run end-to-end tests (v1.28.6)	45m 50s
Run end-to-end tests (v1.27.10)	44m 37s
Run end-to-end tests (v1.26.13)	45m 18s
Run end-to-end tests (v1.25.16)	49m 29s
Process & analyze test artifacts	0s
E2E Tests - Composite result	1s
	4h 19m 50s

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