Optimization: Plugin MergeManifest into snapshot overwrite operation #7899

Job	Run time
integration-test	11m 4s
lint-and-unit-test (3.13)	2m 54s
lint-and-unit-test (3.11)	2m 55s
lint-and-unit-test (3.10)	2m 46s
integration-test-s3	1m 25s
lint-and-unit-test (3.12)	2m 52s
integration-test-gcs	1m 13s
integration-test-adls	1m 22s
cibw-dev-env-smoke-test	24s
integration-coverage-report	31s
	27m 26s

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