fix: parse json5 capability files when `config-json5` is enabled #11900

Job	Run time
test (x86_64-pc-windows-msvc, windows-latest, 1.77.2, false, test, --no-default-features, no-defa...	7m 31s
test (x86_64-pc-windows-msvc, windows-latest, 1.77.2, false, test, --all-features, all)	5m 49s
test (x86_64-unknown-linux-gnu, ubuntu-latest, 1.77.2, false, test, --no-default-features, no-def...	4m 40s
test (x86_64-unknown-linux-gnu, ubuntu-latest, 1.77.2, false, test, --all-features, all)	6m 37s
test (aarch64-apple-darwin, macos-14, 1.77.2, false, test, --no-default-features, no-default)	3m 34s
test (aarch64-apple-darwin, macos-14, 1.77.2, false, test, --all-features, all)	2m 59s
test (aarch64-apple-ios, macos-latest, 1.77.2, false, build, --no-default-features, no-default)	1m 45s
test (aarch64-apple-ios, macos-latest, 1.77.2, false, build, --all-features, all)	1m 4s
test (aarch64-linux-android, ubuntu-latest, 1.77.2, true, build, --no-default-features, no-default)	1m 53s
test (aarch64-linux-android, ubuntu-latest, 1.77.2, true, build, --all-features, all)	1m 23s
	37m 15s

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