Add missing initialization of `compile_only` field for SPIRV C interface #580

Job	Run time
Linux Backcompat	28m 4s
emscripten	2m 52s
android (ON, 23.2.8568313)	8m 29s
linux (clang, clang++, Debug)	10m 7s
android (ON, 25.2.9519653)	9m 4s
linux (clang, clang++, Release)	9m 31s
linux-asan (gcc, g++, Debug, -fsanitize=address)	14m 15s
android (OFF, 23.2.8568313)	9m 40s
linux (gcc, g++, Debug)	14m 29s
linux-asan (gcc, g++, Debug, -fsanitize=thread)	32m 49s
android (OFF, 25.2.9519653)	7m 5s
macos (macos-11, clang, clang++, Debug)	13m 25s
linux (gcc, g++, Release)	9m 9s
macos (macos-11, clang, clang++, Release)	11m 58s
macos (macos-11, gcc, g++, Debug)	14m 15s
windows (windows-2019, windows, Debug)	9m 13s
macos (macos-11, gcc, g++, Release)	12m 37s
macos (macos-12, clang, clang++, Debug)	15m 9s
windows (windows-2019, windows, Release)	11m 18s
macos (macos-12, clang, clang++, Release)	6m 35s
macos (macos-12, gcc, g++, Debug)	15m 9s
macos (macos-12, gcc, g++, Release)	6m 45s
	4h 31m 58s

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