Optimization: Prune manifest in snapshot overwrite operations #7672

Job	Run time
lint-and-unit-test (3.10)	3m 0s
integration-test	3m 9s
lint-and-unit-test (3.13)	3m 3s
lint-and-unit-test (3.11)	2m 49s
integration-test-gcs	1m 21s
integration-test-s3	1m 18s
integration-test-adls	1m 20s
lint-and-unit-test (3.12)	2m 50s
integration-coverage-report	0s
	18m 50s

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