tests/interaction: era-axis machinery for the requirements manifest #2777

Job	Run time
checks / pre-commit	43s
checks / readme-snippets	12s
checks / test (3.10, locked, ubuntu-latest)	1m 2s
checks / test (3.11, locked, ubuntu-latest)	1m 1s
checks / test (3.12, locked, ubuntu-latest)	1m 6s
checks / test (3.11, locked, windows-latest)	1m 33s
checks / test (3.11, lowest-direct, ubuntu-latest)	1m 1s
checks / test (3.10, lowest-direct, windows-latest)	1m 38s
checks / test (3.13, lowest-direct, ubuntu-latest)	58s
checks / test (3.13, locked, ubuntu-latest)	55s
checks / test (3.10, locked, windows-latest)	1m 31s
checks / test (3.12, locked, windows-latest)	1m 24s
checks / test (3.10, lowest-direct, ubuntu-latest)	1m 8s
checks / test (3.14, locked, windows-latest)	2m 25s
checks / test (3.11, lowest-direct, windows-latest)	1m 35s
checks / test (3.14, lowest-direct, windows-latest)	1m 15s
checks / test (3.12, lowest-direct, ubuntu-latest)	1m 4s
checks / test (3.13, locked, windows-latest)	1m 26s
checks / test (3.12, lowest-direct, windows-latest)	2m 17s
checks / test (3.14, lowest-direct, ubuntu-latest)	58s
checks / test (3.13, lowest-direct, windows-latest)	1m 37s
checks / test (3.14, locked, ubuntu-latest)	1m 57s
all-green	3s
	28m 49s

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