Replace nl-unit-test with pigweed for protocols/secure_channel #84657

Job	Run time
Build framework (macos-release, -sdk macosx -configuration Release)	12m 31s
Build framework (macos-release, -sdk macosx -configuration Release)	12m 31s
Build framework (ios-release, -sdk iphoneos -configuration Release)	8m 13s
Build framework (ios-release, -sdk iphoneos -configuration Release)	8m 13s
Build framework (tvos-debug, -sdk appletvos -configuration Debug)	15m 25s
Build framework (tvos-debug, -sdk appletvos -configuration Debug)	15m 25s
Build framework (watchos-debug, -sdk watchos -configuration Debug)	10m 48s
Build framework (watchos-debug, -sdk watchos -configuration Debug)	10m 48s
Run framework tests (asan, -enableAddressSanitizer YES -enableUndefinedBehaviorSanitizer YES)	40m 10s
Run framework tests (asan, -enableAddressSanitizer YES -enableUndefinedBehaviorSanitizer YES)	26m 51s
Run framework tests (tsan, -enableThreadSanitizer YES)	39m 48s
Run framework tests (tsan, -enableThreadSanitizer YES)	25m 0s
Run framework tests (leaks, ENABLE_LEAK_DETECTION=1)	24m 39s
Run framework tests (leaks, ENABLE_LEAK_DETECTION=1)	24m 39s
	4h 35m 1s

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