use ti.boot.memclear to zeroize bss #617

Job	Run time
build-and-test (macos-14, YES)	3m 0s
build-and-test (ubuntu-22.04, YES)	3m 49s
build-and-test (ubuntu-22.04, NO)	3m 23s
docs	5m 10s
build-and-test (macos-15-intel, NO)	5m 9s
build-and-test (windows-latest, YES)	6m 18s
build-and-test (macos-15-intel, YES)	6m 26s
build-and-test (macos-14, NO)	2m 47s
build-and-test (windows-latest, NO)	6m 4s
	42m 6s

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