Revert "Build: Bump gcsfs from 2026.5.0 to 2026.6.0" #9109

Job	Run time
cibw-dev-env-smoke-test	41s
integration-test	10m 56s
integration-test-gcs	1m 34s
integration-test-adls	1m 34s
lint-and-unit-test (3.10)	3m 33s
integration-test-s3	1m 30s
lint-and-unit-test (3.13)	3m 9s
lint-and-unit-test (3.14)	6m 6s
lint-and-unit-test (3.11)	3m 17s
lint-and-unit-test (3.12)	3m 20s
integration-coverage-report	30s
	36m 10s

Provide feedback