[BUG]: add count_matches and fix a bunch of str functions #9117

Job	Run time
integration-test-build (3.8)	7m 18s
benchmark-codspeed	21m 9s
unit-tests-with-coverage (3.8, py, 7.0.0, 0, ubuntu-20.04)	6m 3s
unit-tests-with-coverage (3.8, py, 7.0.0, 1, ubuntu-20.04)	4m 55s
doctests	1m 59s
check-unused-cargo-deps	1m 18s
rust-tests-platform (ubuntu)	3m 2s
unit-tests-with-coverage (3.10, py, 16.0.0, 0, ubuntu-20.04)	10m 58s
rust-tests-platform (Windows)	8m 19s
unit-tests-with-coverage (3.10, py, 16.0.0, 0, windows-latest)	5m 52s
style	2m 35s
unit-tests-with-coverage (3.10, py, 16.0.0, 1, ubuntu-20.04)	9m 45s
test-imports-platform (ubuntu, 3.8)	2m 19s
unit-tests-with-coverage (3.10, py, 16.0.0, 1, windows-latest)	7m 30s
test-imports-platform (Windows, 3.8)	5m 22s
unit-tests-with-coverage (3.10, ray, 16.0.0, 0, ubuntu-20.04)	15m 13s
unit-tests-with-coverage (3.10, ray, 16.0.0, 0, windows-latest)	7m 27s
test-imports	1s
integration-test-tpch (3.8, py)	1m 15s
integration-test-io (3.8, py)	7m 12s
integration-test-tpch (3.8, ray)	1m 14s
integration-test-iceberg (3.8, py)	3m 33s
integration-test-io (3.8, ray)	7m 51s
integration-test-io-credentialed	0s
integration-test-iceberg (3.8, ray)	3m 44s
integration-test-sql (3.8, py)	2m 45s
integration-test-sql (3.8, ray)	3m 2s
rust-tests	1s
unit-tests	1s
Publish coverage reports to CodeCov	12s
integration-tests	1s
	2h 31m 56s

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