tests/interaction: era-axis machinery for the requirements manifest #2771

Job	Run time
checks / pre-commit	45s
checks / readme-snippets	11s
checks / test (3.11, lowest-direct, windows-latest)	1m 32s
checks / test (3.11, locked, ubuntu-latest)	58s
checks / test (3.10, locked, ubuntu-latest)	1m 1s
checks / test (3.10, lowest-direct, windows-latest)	1m 33s
checks / test (3.11, locked, windows-latest)	1m 25s
checks / test (3.10, lowest-direct, ubuntu-latest)	59s
checks / test (3.11, lowest-direct, ubuntu-latest)	1m 1s
checks / test (3.13, locked, windows-latest)	1m 30s
checks / test (3.12, lowest-direct, ubuntu-latest)	1m 6s
checks / test (3.14, lowest-direct, ubuntu-latest)	49s
checks / test (3.13, lowest-direct, ubuntu-latest)	1m 2s
checks / test (3.12, locked, ubuntu-latest)	1m 4s
checks / test (3.12, lowest-direct, windows-latest)	1m 48s
checks / test (3.12, locked, windows-latest)	1m 24s
checks / test (3.14, lowest-direct, windows-latest)	1m 46s
checks / test (3.13, lowest-direct, windows-latest)	1m 49s
checks / test (3.14, locked, ubuntu-latest)	2m 5s
checks / test (3.14, locked, windows-latest)	2m 7s
checks / test (3.13, locked, ubuntu-latest)	48s
checks / test (3.10, locked, windows-latest)	1m 23s
all-green	4s
	28m 10s

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