Cleanup of toolchains, more for different purposes

Makefile

 macos-ci:
 	python3 -u tools/ci.py \
 		-B download \
-		-T tools/gcc-9.jsonc
+		-T tools/gcc-9-rel.jsonc
 	mv _build/dds _build/dds-macos-x64
 
 linux-ci:
 	python3 -u tools/ci.py \
 		-B download \
-		-T tools/gcc-9-static.jsonc
+		-T tools/gcc-9-static-rel.jsonc
 	mv _build/dds _build/dds-linux-x64
 
 nix-ci:
 	python3 -u tools/ci.py \
 		-B download \
-		-T tools/gcc-9.jsonc
+		-T tools/gcc-9-rel.jsonc
 
 vagrant-freebsd-ci:
 	vagrant up freebsd11
 		python3.7 tools/ci.py \
 			-B download \
 			-T tools/freebsd-gcc-9.jsonc \
-			-T2 tools/freebsd-gcc-9.next.jsonc \
 		'
 	vagrant scp freebsd11:/vagrant/_build/dds _build/dds-freebsd-x64
 	vagrant halt

tools/freebsd-gcc-9.jsonc

     ],
     "link_flags": [
         "-static-libgcc",
-        "-static-libstdc++",
+        "-static-libstdc++"
     ],
-    // "debug": true,
-    "optimize": true,
-    "compiler_launcher": "ccache"
+    "optimize": true
 }

tools/gcc-9-dev.jsonc

+{
+    "$schema": "../res/toolchain-schema.json",
+    "compiler_id": "gnu",
+    "c_compiler": "gcc-9",
+    "cxx_compiler": "g++-9",
+    "warning_flags": [
+        "-Werror",
+    ],
+    "flags": [
+        "-fsanitize=address,undefined"
+    ],
+    "cxx_flags": [
+        "-fconcepts",
+        "-std=c++2a",
+    ],
+    "link_flags": [
+        "-fuse-ld=lld",
+        "-fsanitize=address,undefined"
+    ],
+    "debug": true,
+    "compiler_launcher": "ccache"
+}

tools/gcc-9.jsonc → tools/gcc-9-rel.jsonc

         "-static-libgcc",
         "-static-libstdc++"
     ],
-    // "debug": true,
-    "optimize": true,
-    "compiler_launcher": "ccache"
+    "optimize": true
 }

tools/gcc-9-static.jsonc → tools/gcc-9-static-rel.jsonc

         "-std=c++2a",
     ],
     "link_flags": [
-        "-static",
+        "-static"
     ],
-    // "debug": true,
-    "optimize": true,
-    "compiler_launcher": "ccache"
+    "optimize": true
 }