plugin_proxy: core: expose more callbacks for golang plugins #8102

Job	Run time
run-ubuntu-unit-tests (-DFLB_JEMALLOC=On, gcc)	19m 6s
run-ubuntu-unit-tests (-DFLB_JEMALLOC=On, clang)	19m 49s
run-ubuntu-unit-tests (-DFLB_JEMALLOC=Off, gcc)	18m 15s
run-ubuntu-unit-tests (-DFLB_JEMALLOC=Off, clang)	18m 59s
run-ubuntu-unit-tests (-DFLB_SMALL=On, gcc)	19m 16s
run-ubuntu-unit-tests (-DFLB_SMALL=On, clang)	19m 2s
run-ubuntu-unit-tests (-DSANITIZE_ADDRESS=On, gcc)	18m 33s
run-ubuntu-unit-tests (-DSANITIZE_ADDRESS=On, clang)	18m 51s
run-ubuntu-unit-tests (-DSANITIZE_UNDEFINED=On, gcc)	18m 33s
run-ubuntu-unit-tests (-DSANITIZE_UNDEFINED=On, clang)	18m 4s
run-ubuntu-unit-tests (-DFLB_COVERAGE=On, gcc)	50m 17s
run-ubuntu-unit-tests (-DFLB_SANITIZE_MEMORY=On, gcc)	18m 29s
run-ubuntu-unit-tests (-DFLB_SANITIZE_MEMORY=On, clang)	17m 39s
run-ubuntu-unit-tests (-DFLB_SANITIZE_THREAD=On, gcc)	19m 8s
run-ubuntu-unit-tests (-DFLB_SANITIZE_THREAD=On, clang)	17m 54s
run-macos-unit-tests (-DFLB_JEMALLOC=Off)	15m 47s
run-macos-unit-tests (-DFLB_SANITIZE_MEMORY=On)	16m 15s
run-macos-unit-tests (-DFLB_SANITIZE_THREAD=On)	14m 32s
Unit tests (matrix)	1s
	5h 58m 30s

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