ci: enable various runtime checks on FreeBSD and macOS

Increase likelihood of discovering problems during CI rather the buildfarm by
defining -DRELCACHE_FORCE_RELEASE -DCOPY_PARSE_PLAN_TREES
-DWRITE_READ_PARSE_PLAN_TREES -DRAW_EXPRESSION_COVERAGE_TEST on FreeBSD, and
-DRANDOMIZE_ALLOCATED_MEMORY on macOS.

FreeBSD and macoS are currently not CI bottlenecks, so we can afford to
increase their test times a bit.

Author: Justin Pryzby <pryzbyj@telsasoft.com>
Discussion: https://postgr.es/m/20220910200542.GX31833@telsasoft.com

.cirrus.yml

@@ -66,6 +66,7 @@ task:
     TEST_JOBS: 3
 
     CCACHE_DIR: /tmp/ccache_dir
+    CPPFLAGS: -DRELCACHE_FORCE_RELEASE -DCOPY_PARSE_PLAN_TREES -DWRITE_READ_PARSE_PLAN_TREES -DRAW_EXPRESSION_COVERAGE_TEST
     CFLAGS: -Og -ggdb
 
   only_if: $CIRRUS_CHANGE_MESSAGE !=~ '.*\nci-os-only:.*' || $CIRRUS_CHANGE_MESSAGE =~ '.*\nci-os-only:[^\n]*freebsd.*'
@@ -306,6 +307,7 @@ task:
 
     CC: ccache cc
     CXX: ccache c++
+    CPPFLAGS: -DRANDOMIZE_ALLOCATED_MEMORY
     CFLAGS: -Og -ggdb
     CXXFLAGS: -Og -ggdb