Add missing configuration options for the Ada Language Server. (#4567) #5593

Job	Run time
test (ubuntu-latest, 27.2, false)	2m 8s
test (ubuntu-latest, 28.2, false)	2m 37s
test (ubuntu-latest, 29.4, false)	4m 59s
test (macos-latest, 28.2, false)	4m 58s
test (macos-latest, 29.4, false)	6m 3s
test (windows-latest, 27.2, false)	3m 26s
test (windows-latest, 28.2, false)	8m 10s
test (windows-latest, 29.4, false)	8m 40s
test (ubuntu-latest, snapshot, true)	1m 2s
test (macos-latest, snapshot, true)	1m 55s
test (windows-latest, snapshot, true)	17m 16s
	1h 1m 14s

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