Try to fix remaining ASAN-reported leaks (#7767)

This fixes all but one of the known remaining ASAN-related leaks; the remaining is in `tutorial_lesson_19_wrapper_funcs`

I can't debug that one locally because the leaks are in OpenCL and I am temporarily relegated to using a 'cloud' machine with no real GPU for linux-x64 -- if someone with access to such a machine could take a look, I'd appreciate it (examples of leakage at https://buildbot.halide-lang.org/master/#/builders/154/builds/79/steps/12/logs/tutorial_lesson_19_wrapper_funcs)

cmake/toolchain.linux-x64-asan.cmake

@@ -34,6 +34,10 @@ set(CMAKE_CROSSCOMPILING_EMULATOR /usr/bin/env)
 # Can't mix -fsanitize=address with -fsanitize=fuzzer
 set(WITH_TEST_FUZZ OFF)
 
+# Sanitizer builds intermittently fail when using CCache for reasons that aren't
+# clear; default to turning it off
+set(Halide_CCACHE_BUILD OFF)
+
 if (NOT DEFINED Halide_SHARED_ASAN_RUNTIME_LIBRARY)
     execute_process(
         COMMAND ${CMAKE_CXX_COMPILER} "-print-file-name=libclang_rt.asan.so"
@@ -49,3 +53,4 @@ set(
     Halide_PYTHON_LAUNCHER
     ${CMAKE_COMMAND} -E env ASAN_OPTIONS=detect_leaks=0 LD_PRELOAD=${Halide_SHARED_ASAN_RUNTIME_LIBRARY}
 )
+

cmake/toolchain.linux-x64-fuzzer.cmake

@@ -30,3 +30,7 @@ set(CMAKE_FIND_ROOT_PATH_MODE_INCLUDE ONLY)
 set(CMAKE_FIND_ROOT_PATH_MODE_PACKAGE ONLY)
 
 set(CMAKE_CROSSCOMPILING_EMULATOR /usr/bin/env)
+
+# Sanitizer builds intermittently fail when using CCache for reasons that aren't
+# clear; default to turning it off
+set(Halide_CCACHE_BUILD OFF)

test/correctness/skip_stages_memoize.cpp

@@ -228,6 +228,8 @@ int main(int argc, char **argv) {
         return 1;
     }
 
+    Internal::JITSharedRuntime::release_all();
+
     printf("Success!\n");
     return 0;
 }

test/generator/error_codes_aottest.cpp

@@ -126,6 +126,9 @@ int main(int argc, char **argv) {
     check(result, correct);
     in.dim = shape;
 
+    free(in.host);
+    free(out.host);
+
     printf("Success!\n");
     return 0;
 }