Build: Bump gcsfs from 2026.4.0 to 2026.5.0 #8879

Job	Run time
integration-test-s3	1m 24s
integration-test-adls	1m 40s
integration-test-gcs	1m 29s
integration-test	11m 1s
lint-and-unit-test (3.10)	3m 18s
lint-and-unit-test (3.13)	3m 17s
lint-and-unit-test (3.14)	5m 56s
lint-and-unit-test (3.11)	3m 41s
lint-and-unit-test (3.12)	3m 13s
cibw-dev-env-smoke-test	45s
integration-coverage-report	29s
	36m 13s

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