build: use the system provided packages if found #9940

Job	Run time
run-ubuntu-unit-tests (-DFLB_JEMALLOC=On, gcc)	13m 32s
run-ubuntu-unit-tests (-DFLB_JEMALLOC=On, clang)	13m 53s
run-ubuntu-unit-tests (-DFLB_JEMALLOC=Off, gcc)	13m 0s
run-ubuntu-unit-tests (-DFLB_JEMALLOC=Off, clang)	12m 49s
run-ubuntu-unit-tests (-DFLB_SMALL=On, gcc)	12m 59s
run-ubuntu-unit-tests (-DFLB_SMALL=On, clang)	13m 48s
run-ubuntu-unit-tests (-DSANITIZE_ADDRESS=On, gcc)	13m 10s
run-ubuntu-unit-tests (-DSANITIZE_ADDRESS=On, clang)	13m 9s
run-ubuntu-unit-tests (-DSANITIZE_UNDEFINED=On, gcc)	13m 15s
run-ubuntu-unit-tests (-DSANITIZE_UNDEFINED=On, clang)	13m 11s
run-ubuntu-unit-tests (-DFLB_COVERAGE=On, gcc)	45m 56s
run-ubuntu-unit-tests (-DFLB_SANITIZE_MEMORY=On, gcc)	12m 47s
run-ubuntu-unit-tests (-DFLB_SANITIZE_MEMORY=On, clang)	12m 54s
run-ubuntu-unit-tests (-DFLB_SANITIZE_THREAD=On, gcc)	12m 57s
run-ubuntu-unit-tests (-DFLB_SANITIZE_THREAD=On, clang)	12m 57s
run-macos-unit-tests (-DFLB_JEMALLOC=Off)	12m 26s
run-macos-unit-tests (-DFLB_SANITIZE_MEMORY=On)	12m 11s
run-macos-unit-tests (-DFLB_SANITIZE_THREAD=On)	12m 13s
Unit tests (matrix)	1s
	4h 27m 8s

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