[FEAT] iceberg writes unpartitioned #6170

Job	Run time
unit-tests-with-coverage (3.7, py, 6.0.1, ubuntu)	4m 57s
rust-tests (ubuntu)	3m 39s
unit-tests-with-coverage (3.7, py, 6.0.1, windows)	9m 40s
rust-tests (windows)	6m 15s
unit-tests-with-coverage (3.7, py, 12, ubuntu)	8m 27s
integration-test-build (3.7)	5m 1s
unit-tests-with-coverage (3.7, ray, 6.0.1, windows)	9m 58s
style (3.8)	1m 33s
unit-tests-with-coverage (3.7, ray, 12, ubuntu)	10m 1s
unit-tests-with-coverage (3.10, py, 6.0.1, windows)	9m 9s
unit-tests-with-coverage (3.10, py, 12, ubuntu)	7m 13s
test-imports (ubuntu, 3.7)	2m 39s
unit-tests-with-coverage (3.10, ray, 6.0.1, windows)	9m 25s
test-imports (windows, 3.7)	4m 34s
unit-tests-with-coverage (3.10, ray, 12, ubuntu)	9m 1s
integration-test-iceberg (3.8, py)	3m 51s
integration-test-io (3.8, py)	5m 54s
integration-test-tpch (3.7, py)	2m 1s
integration-test-iceberg (3.8, ray)	4m 33s
integration-test-io (3.8, ray)	6m 12s
integration-test-tpch (3.7, ray)	2m 23s
integration-test-io-credentialed	0s
integration-test-sql (3.8, py)	3m 8s
integration-test-sql (3.8, ray)	3m 16s
Publish coverage reports to CodeCov	7s
	2h 12m 57s

Provide feedback