fix: explicitly load required pytest plugins in addopts (#2055) #686

Job	Run time
checks / readme-snippets	11s
checks / pre-commit	37s
checks / test (3.12, lowest-direct, ubuntu-latest)	57s
checks / test (3.12, lowest-direct, windows-latest)	3m 32s
checks / test (3.10, locked, windows-latest)	2m 18s
checks / test (3.10, lowest-direct, windows-latest)	3m 4s
checks / test (3.10, lowest-direct, ubuntu-latest)	58s
checks / test (3.11, lowest-direct, ubuntu-latest)	54s
checks / test (3.14, lowest-direct, windows-latest)	2m 20s
checks / test (3.12, locked, windows-latest)	3m 26s
checks / test (3.12, locked, ubuntu-latest)	56s
checks / test (3.11, locked, windows-latest)	2m 28s
checks / test (3.14, lowest-direct, ubuntu-latest)	1m 17s
checks / test (3.11, locked, ubuntu-latest)	53s
checks / test (3.10, locked, ubuntu-latest)	54s
checks / test (3.13, locked, windows-latest)	2m 33s
checks / test (3.13, lowest-direct, ubuntu-latest)	57s
checks / test (3.13, lowest-direct, windows-latest)	2m 44s
checks / test (3.14, locked, ubuntu-latest)	2m 23s
checks / test (3.14, locked, windows-latest)	3m 6s
checks / test (3.13, locked, ubuntu-latest)	45s
checks / test (3.11, lowest-direct, windows-latest)	2m 24s
all-green	4s
	39m 41s

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