test: add antora 3.1.10 and isolate e2e tests even more

[jekkel]

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[github-actions]

Coverage after merging feature/improved-e2e-antora-3110 into main will be

51.84%	▾ -30.00%

Coverage Report

File	Stmts	Branches	Funcs	Lines	Uncovered Lines
lib
content-source-factory.js	7.14%	0%	0%	12.50%	13–15, 25–26, 31, 31, 35–36
extension.js	73.33%	50%	100%	78.57%	45, 55–56, 56, 56–57, 68–70, 70, 70–71
maven-client.js	8.06%	0%	0%	11.76%	102–103, 103, 103–105, 108, 112, 112, 112–113, 115–119, 135, 141–143, 143, 143–144, 146, 154, 154, 161, 175, 183, 183, 191–194, 194, 194–195, 197, 20, 201–204, 208, 212–213, 213, 213–215, 217–219, 223–224, 224, 224–225, 227–228, 228, 228–229, 231, 237–238, 31–34, 34, 34–35, 37, 37, 37, 37, 37, 40, 44, 46, 50, 52, 64, 64, 64–65, 67, 84–91, 91, 91–93, 93, 93–94, 98–99
maven-content-source.js	4.55%	0%	0%	6.38%	101, 105–106, 106, 106–107, 107, 107, 110, 115, 115, 115–116, 118, 118, 118–119, 121, 121, 121–122, 124, 128, 135–136, 21, 39–47, 49, 49, 49–50, 52, 56, 60, 70–73, 73, 73, 75, 77–79, 85–89, 95
maven-files.js	88.49%	71.11%	100%	96.39%	164, 168, 168–169, 169, 169, 171, 171, 171–172, 172, 172, 36, 38, 58–59
maven-types.js	10.38%	3.77%	20%	16.28%	10, 106–108, 11, 118, 120, 120, 120–121, 124, 126, 130–132, 151, 26, 26–31, 35–36, 36–37, 37, 59, 61–63, 71, 71, 71–72, 72, 72–73, 73, 73, 73–74, 74, 74, 74–75, 75, 75, 75–77, 77, 77, 77–78, 78, 78–79, 81, 81, 81, 81–85, 85, 85, 85–86, 86, 86–87, 89, 89, 89, 89, 93, 93, 93, 93, 93, 93, 93, 93, 93
version-selector.js	80.49%	75%	100%	82.61%	30, 30, 32–33, 4–6, 9
versioning.js	86.67%	89.19%	80%	87.30%	105, 110–111, 121–122, 124–125, 143, 28, 35, 84–85