tests/interaction: era-axis machinery for the requirements manifest #2776

Job	Run time
checks / pre-commit	41s
checks / readme-snippets	14s
checks / test (3.10, lowest-direct, ubuntu-latest)	1m 0s
checks / test (3.11, lowest-direct, ubuntu-latest)	58s
checks / test (3.12, lowest-direct, ubuntu-latest)	1m 8s
checks / test (3.12, lowest-direct, windows-latest)	1m 31s
checks / test (3.13, lowest-direct, windows-latest)	1m 47s
checks / test (3.14, lowest-direct, windows-latest)	2m 2s
checks / test (3.11, locked, ubuntu-latest)	58s
checks / test (3.12, locked, windows-latest)	1m 1s
checks / test (3.12, locked, ubuntu-latest)	45s
checks / test (3.11, locked, windows-latest)	1m 40s
checks / test (3.14, locked, windows-latest)	1m 58s
checks / test (3.14, locked, ubuntu-latest)	1m 56s
checks / test (3.13, locked, windows-latest)	1m 42s
checks / test (3.13, lowest-direct, ubuntu-latest)	59s
checks / test (3.10, locked, windows-latest)	1m 23s
checks / test (3.14, lowest-direct, ubuntu-latest)	53s
checks / test (3.10, lowest-direct, windows-latest)	1m 45s
checks / test (3.13, locked, ubuntu-latest)	55s
checks / test (3.11, lowest-direct, windows-latest)	1m 27s
checks / test (3.10, locked, ubuntu-latest)	51s
all-green	5s
	27m 39s

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