Add option to create a minimal markdown test report #1890

Job	Run time
deploy	42s
test (3.8, lint)	43s
test (3.8, lint_docs)	1m 21s
test (3.8, mypy)	41s
test (3.8, unit-quick)	18m 6s
test (3.8, unit-diagnostic-servebasic-gx-dev)	4m 20s
test (3.8, unit-nonredundant-noclientbuild-noshed-gx-2109)	17m 0s
test (3.8, unit-nonredundant-noclientbuild-noshed-gx-2205)	15m 31s
test (3.8, unit-nonredundant-noclientbuild-noshed-gx-dev)	27m 21s
test (3.8, unit-nonredundant-noclientbuild-noshed-nogx)	56m 4s
test (3.8, unit-diagnostic-serveclientcmd)	4m 16s
test (3.11, lint)	39s
test (3.11, mypy)	45s
test (3.11, unit-quick)	20m 9s
	2h 47m 38s

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