Introduce lsp-completion-passthrough-try-completion #5349

Job	Run time
test (ubuntu-latest, 27.2, false)	2m 10s
test (ubuntu-latest, 28.2, false)	3m 10s
test (ubuntu-latest, 29.4, false)	2m 52s
test (macos-latest, 28.2, false)	3m 52s
test (macos-latest, 29.4, false)	4m 22s
test (windows-latest, 27.2, false)	3m 29s
test (windows-latest, 28.2, false)	3m 31s
test (windows-latest, 29.4, false)	5m 31s
test (ubuntu-latest, snapshot, true)	1m 28s
test (macos-latest, snapshot, true)	2m 43s
test (windows-latest, snapshot, true)	3m 48s
	36m 56s

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