Associate zig-ts-mode with zig language id. (#4583) #5428

Job	Run time
test (ubuntu-latest, 27.2, false)	2m 4s
test (ubuntu-latest, 28.2, false)	2m 32s
test (ubuntu-latest, 29.4, false)	3m 14s
test (macos-latest, 28.2, false)	3m 45s
test (macos-latest, 29.4, false)	4m 10s
test (windows-latest, 27.2, false)	3m 57s
test (windows-latest, 28.2, false)	4m 28s
test (windows-latest, 29.4, false)	3m 27s
test (ubuntu-latest, snapshot, true)	1m 26s
test (macos-latest, snapshot, true)	2m 47s
test (windows-latest, snapshot, true)	5m 33s
	37m 23s

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