Change macos-latest to macos-12 #1222

Job	Run time
Build Doxygen Docs	49s
Test RPP as package - ubuntu-latest	50s
Sanitize - tsan	6m 25s
tests ci-ubuntu-gcc Release	10m 45s
Sanitize - asan	9m 54s
tests ci-ubuntu-gcc Debug	10m 13s
Sanitize - lsan	5m 43s
Sanitize - ubsan	4m 1s
benchmarks ci-ubuntu-gcc Release	2m 15s
benchmarks ci-ubuntu-gcc Debug	2m 18s
tests ci-ubuntu-clang Release	11m 5s
tests ci-ubuntu-clang Debug	10m 13s
benchmarks ci-ubuntu-clang Release	2m 32s
benchmarks ci-ubuntu-clang Debug	2m 3s
tests ci-windows Release	6m 55s
tests ci-windows Debug	6m 3s
benchmarks ci-windows Release	3m 59s
benchmarks ci-windows Debug	5m 39s
tests ci-macos Release	10m 16s
tests ci-macos Debug	8m 58s
benchmarks ci-macos Release	5m 53s
benchmarks ci-macos Debug	5m 28s
	2h 12m 17s

Provide feedback