tests/interaction: era-axis machinery for the requirements manifest #2772

Job	Run time
checks / pre-commit	45s
checks / readme-snippets	11s
checks / test (3.12, locked, windows-latest)	1m 32s
checks / test (3.11, lowest-direct, ubuntu-latest)	1m 7s
checks / test (3.10, locked, ubuntu-latest)	58s
checks / test (3.12, lowest-direct, windows-latest)	1m 36s
checks / test (3.11, lowest-direct, windows-latest)	1m 32s
checks / test (3.11, locked, windows-latest)	1m 20s
checks / test (3.14, lowest-direct, ubuntu-latest)	56s
checks / test (3.14, locked, windows-latest)	2m 28s
checks / test (3.11, locked, ubuntu-latest)	59s
checks / test (3.10, lowest-direct, ubuntu-latest)	1m 0s
checks / test (3.12, lowest-direct, ubuntu-latest)	1m 5s
checks / test (3.10, lowest-direct, windows-latest)	1m 25s
checks / test (3.12, locked, ubuntu-latest)	58s
checks / test (3.13, lowest-direct, windows-latest)	1m 32s
checks / test (3.13, locked, windows-latest)	1m 26s
checks / test (3.14, lowest-direct, windows-latest)	1m 34s
checks / test (3.14, locked, ubuntu-latest)	3m 11s
checks / test (3.13, lowest-direct, ubuntu-latest)	57s
checks / test (3.13, locked, ubuntu-latest)	54s
checks / test (3.10, locked, windows-latest)	1m 52s
all-green	3s
	29m 21s

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