Remove Makefiles in compiler/ and frontend/ (chapel-lang#25907)

Ever since PR chapel-lang#20920, we have been using `cmake` to build the compiler
and frontend library. However, we have left the old `Makefile`s lying
around and have continued to maintain them as we add or remove files.
These Makefiles have been unused, except for in TAGS support.

This PR changes the TAGS support to use a `find` command to gather
source files in these directories and then removes these Makefiles that
are now completely unused.

Reviewed by @arezaii - thanks!

- [x] full comm=none testing

compiler/Makefile

@@ -40,33 +40,16 @@ ALL_HEADERS= */*.h ../frontend/include/chpl/*/*.h
 
 # Generate tags command, dependent on if Make variable, TAGS == 1
 ifeq ($(TAGS), 1)
-TAGS_COMMAND=-@(which $(CHPL_TAGS_UTIL) > /dev/null 2>&1 && echo "Updating TAGS..." && $(CHPL_TAGS_UTIL) $(CHPL_TAGS_FLAGS) $(ALL_SRCS) $(ALL_HEADERS)) || echo "$(CHPL_TAGS_UTIL) not available"
-EBROWSE_COMMAND=-@(which ebrowse > /dev/null 2>&1 && echo "Updating BROWSE..." && ebrowse $(ALL_SRCS) $(ALL_HEADERS)) || echo "ebrowse not available"
+$(info Gathering source files for ctags/etags)
+COMPILER_SOURCES=$(shell find . -name '*.h' -or -name '*.cpp' -or -name '*.c')
+FRONTEND_SOURCES=$(shell find ../frontend/lib -name '*.h' -or -name '*.cpp' -or -name '*.c')
+FRONTEND_HEADERS=$(shell find ../frontend/include -name '*.h')
+ALL_SOURCES=$(COMPILER_SOURCES) $(FRONTEND_SOURCES) $(FRONTEND_HEADERS)
+# create the TAGS_COMMAND and EBROWSE_COMMAND variables for use later
+TAGS_COMMAND=-@(which $(CHPL_TAGS_UTIL) > /dev/null 2>&1 && echo "Updating TAGS..." && $(CHPL_TAGS_UTIL) $(CHPL_TAGS_FLAGS) $(ALL_SOURCES)) || echo "$(CHPL_TAGS_UTIL) not available"
+EBROWSE_COMMAND=-@(which ebrowse > /dev/null 2>&1 && echo "Updating BROWSE..." && ebrowse $(ALL_SOURCES)) || echo "ebrowse not available"
 endif
 
-#
-# include source subdirectories here
-# include these subdirs so ETAGS builds tags for .cpp files too
-include ../frontend/lib/immediates/Makefile.include
-include ../frontend/lib/parsing/Makefile.include
-include ../frontend/lib/framework/Makefile.include
-include ../frontend/lib/resolution/Makefile.include
-include ../frontend/lib/types/Makefile.include
-include ../frontend/lib/uast/Makefile.include
-include ../frontend/lib/util/Makefile.include
-
-include adt/Makefile.include
-include AST/Makefile.include
-include backend/Makefile.include
-include codegen/Makefile.include
-include llvm/Makefile.include
-include main/Makefile.include
-include optimizations/Makefile.include
-include passes/Makefile.include
-include resolution/Makefile.include
-include util/Makefile.include
-
-
 TARGETS = $(CHPL)
 
 LIBS = -lm