Emit a dSYM archive on MacOS with C backend (#27101)

Adjusts the Chapel executable Makefiles to invoke dsymutil on MacOS when
debugging information is requested. This is only done when the target
compiler is not LLVM, as the Chapel compiler already handles this case
for LLVM.

This improves the generated debug symbols on MacOS when using the C
backend, without needing to save the generated C files

This PR builds on the work in
#24436

[Reviewed by @dlongnecke-cray]

Author: jabraham17

runtime/etc/Makefile.exe

@@ -47,12 +47,36 @@ ifneq ($(SKIP_COMPILE_LINK),skip)
 	      $(COMP_GEN_USER_LDFLAGS) $(COMP_GEN_LFLAGS) $(LIBS) \
 	      $(CHPL_MAKE_TARGET_SYSTEM_LINK_ARGS)
 endif
+ifeq ($(COMP_GEN_DEBUG),1)
+ifeq ($(CHPL_MAKE_TARGET_PLATFORM),darwin)
+ifneq ($(CHPL_MAKE_TARGET_COMPILER),llvm)
+	dsymutil $(TMPBINNAME) -o $(TMPBINNAME).dSYM
+endif
+endif
+endif
 ifneq ($(CHPL_MAKE_LAUNCHER),none)
 	$(MAKE) -f $(CHPL_MAKE_HOME)/runtime/etc/Makefile.launcher all CHPL_MAKE_HOME=$(CHPL_MAKE_HOME) TMPBINNAME=$(TMPBINNAME) BINNAME=$(BINNAME) TMPDIRNAME=$(TMPDIRNAME) CHPL_MAKE_RUNTIME_LIB=$(CHPL_MAKE_RUNTIME_LIB) CHPL_MAKE_RUNTIME_INCL=$(CHPL_MAKE_RUNTIME_INCL) CHPL_MAKE_THIRD_PARTY=$(CHPL_MAKE_THIRD_PARTY)
 endif
 ifneq ($(TMPBINNAME),$(BINNAME))
+ifeq ($(COMP_GEN_DEBUG),1)
+ifeq ($(CHPL_MAKE_TARGET_PLATFORM),darwin)
+ifneq ($(CHPL_MAKE_TARGET_COMPILER),llvm)
+	rm -f $(BINNAME)
+	rm -rf $(BINNAME).dSYM
+	mv $(TMPBINNAME) $(BINNAME)
+	mv $(TMPBINNAME).dSYM $(BINNAME).dSYM
+else
+	rm -f $(BINNAME)
+	mv $(TMPBINNAME) $(BINNAME)
+endif
+else
+	rm -f $(BINNAME)
+	mv $(TMPBINNAME) $(BINNAME)
+endif
+else
 	rm -f $(BINNAME)
 	mv $(TMPBINNAME) $(BINNAME)
 endif
+endif
 
 FORCE: