ci(conformance): pin harness to 0.2.0-alpha.3 with expected-failures … #2708

Job	Run time
checks / pre-commit	37s
checks / readme-snippets	11s
checks / test (3.10, locked, windows-latest)	1m 18s
checks / test (3.12, lowest-direct, ubuntu-latest)	57s
checks / test (3.13, locked, ubuntu-latest)	45s
checks / test (3.11, lowest-direct, windows-latest)	1m 29s
checks / test (3.13, lowest-direct, windows-latest)	1m 46s
checks / test (3.12, locked, windows-latest)	1m 24s
checks / test (3.10, locked, ubuntu-latest)	56s
checks / test (3.13, lowest-direct, ubuntu-latest)	55s
checks / test (3.14, lowest-direct, ubuntu-latest)	50s
checks / test (3.14, locked, windows-latest)	2m 28s
checks / test (3.11, lowest-direct, ubuntu-latest)	56s
checks / test (3.14, locked, ubuntu-latest)	1m 39s
checks / test (3.12, locked, ubuntu-latest)	58s
checks / test (3.10, lowest-direct, ubuntu-latest)	50s
checks / test (3.11, locked, windows-latest)	1m 25s
checks / test (3.13, locked, windows-latest)	1m 44s
checks / test (3.14, lowest-direct, windows-latest)	1m 30s
checks / test (3.10, lowest-direct, windows-latest)	1m 18s
checks / test (3.12, lowest-direct, windows-latest)	1m 31s
checks / test (3.11, locked, ubuntu-latest)	55s
all-green	3s
	26m 25s

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