feat: [ArtifactRegistry] add image_manifest field in DockerImage (#8731) #5382

Job	Run time
Dev Commands Unit Tests	51s
Package Tests	9m 39s
Package Tests (Lowest Dependencies)	9m 12s
PHP 8.1 Unit Test (ubuntu-latest)	5m 17s
PHP 8.2 Unit Test (ubuntu-latest)	5m 19s
PHP 8.3 Unit Test (windows-latest)	4m 12s
PHP 8.1 Unit Test (windows-latest)	5m 28s
PHP 8.4 Unit Test (ubuntu-latest)	4m 35s
PHP 8.1 Unit Test + protobuf extension (ubuntu-latest)	4m 25s
PHP 8.2 Unit Test (windows-latest)	5m 33s
PHP 8.4 Unit Test (windows-latest)	4m 51s
PHP 8.3 Unit Test (ubuntu-latest)	4m 33s
	1h 3m 55s

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