tests/interaction: era-axis machinery for the requirements manifest (… #2781

Job	Run time
checks / pre-commit	43s
checks / readme-snippets	13s
checks / test (3.13, lowest-direct, ubuntu-latest)	58s
checks / test (3.11, locked, windows-latest)	1m 31s
checks / test (3.10, locked, windows-latest)	1m 20s
checks / test (3.12, lowest-direct, windows-latest)	1m 40s
checks / test (3.12, lowest-direct, ubuntu-latest)	1m 8s
checks / test (3.12, locked, windows-latest)	1m 48s
checks / test (3.13, lowest-direct, windows-latest)	1m 36s
checks / test (3.10, lowest-direct, ubuntu-latest)	1m 1s
checks / test (3.13, locked, ubuntu-latest)	56s
checks / test (3.12, locked, ubuntu-latest)	1m 7s
checks / test (3.13, locked, windows-latest)	1m 25s
checks / test (3.14, lowest-direct, windows-latest)	1m 23s
checks / test (3.11, lowest-direct, windows-latest)	1m 35s
checks / test (3.14, locked, windows-latest)	2m 34s
checks / test (3.14, lowest-direct, ubuntu-latest)	53s
checks / test (3.14, locked, ubuntu-latest)	2m 1s
checks / test (3.10, locked, ubuntu-latest)	58s
checks / test (3.10, lowest-direct, windows-latest)	1m 39s
checks / test (3.11, locked, ubuntu-latest)	1m 2s
checks / test (3.11, lowest-direct, ubuntu-latest)	1m 2s
all-green	3s
	28m 36s

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