Make ASAN build not be debug, following clangs recommendation (#54094)

Author: gbaraldi

contrib/asan/Make.user.asan

@@ -17,9 +17,6 @@ override SANITIZE_ADDRESS=1
 # make the GC use regular malloc/frees, which are hooked by ASAN
 override WITH_GC_DEBUG_ENV=1
 
-# default to a debug build for better line number reporting
-override JULIA_BUILD_MODE=debug
-
 # Enable Julia assertions and LLVM assertions
 FORCE_ASSERTIONS=1
 LLVM_ASSERTIONS=1

sysimage.mk

@@ -63,13 +63,13 @@ RELBUILDROOT := $(call rel_path,$(JULIAHOME)/base,$(BUILDROOT)/base)/ # <-- make
 $(build_private_libdir)/corecompiler.ji: $(COMPILER_SRCS)
 	@$(call PRINT_JULIA, cd $(JULIAHOME)/base && \
 	$(call spawn,$(JULIA_EXECUTABLE)) -C "$(JULIA_CPU_TARGET)" $(HEAPLIM) --output-ji $(call cygpath_w,$@).tmp \
-		--startup-file=no --warn-overwrite=yes -g$(BOOTSTRAP_DEBUG_LEVEL) -O0 compiler/compiler.jl)
+		--startup-file=no --warn-overwrite=yes -g$(BOOTSTRAP_DEBUG_LEVEL) -O1 compiler/compiler.jl)
 	@mv $@.tmp $@
 
 $(build_private_libdir)/sys.ji: $(build_private_libdir)/corecompiler.ji $(JULIAHOME)/VERSION $(BASE_SRCS) $(STDLIB_SRCS)
 	@$(call PRINT_JULIA, cd $(JULIAHOME)/base && \
 	if ! JULIA_BINDIR=$(call cygpath_w,$(build_bindir)) WINEPATH="$(call cygpath_w,$(build_bindir));$$WINEPATH" \
-			$(call spawn, $(JULIA_EXECUTABLE)) -g1 -O0 -C "$(JULIA_CPU_TARGET)" $(HEAPLIM) --output-ji $(call cygpath_w,$@).tmp $(JULIA_SYSIMG_BUILD_FLAGS) \
+			$(call spawn, $(JULIA_EXECUTABLE)) -g1 -O1 -C "$(JULIA_CPU_TARGET)" $(HEAPLIM) --output-ji $(call cygpath_w,$@).tmp $(JULIA_SYSIMG_BUILD_FLAGS) \
 			--startup-file=no --warn-overwrite=yes --sysimage $(call cygpath_w,$<) sysimg.jl $(RELBUILDROOT); then \
 		echo '*** This error might be fixed by running `make clean`. If the error persists$(COMMA) try `make cleanall`. ***'; \
 		false; \