Switch ui/adaptagrams to overlay convention

.orchestra/config/components.yml

 #@ load("@ytt:template", "template")
 #@ load("@ytt:data", "data")
 
-#@ load("/components/ui/adaptagrams.lib.yml", "adaptagrams_component")
 #@ load("/components/ui/mesa.lib.yml", "mesa_component")
 #@ load("/components/ui/libglvnd.lib.yml", "libglvnd_component")
 
@@ -20,7 +19,6 @@
 
 #@ load("/global_options.lib.yml", "options")
 components:
-  ui/adaptagrams: #@ adaptagrams_component
   ui/mesa: #@ mesa_component
   ui/libglvnd: #@ libglvnd_component
 

.orchestra/config/components/ui/adaptagrams.lib.yml → .orchestra/config/components/ui/adaptagrams.yml

+#@ load("@ytt:overlay", "overlay")
 #@ load("/lib/cmake.lib.yml", "typical_cmake_builds")
 
 ---
@@ -10,11 +11,10 @@ dependencies:
 use_asan: false
 #@ end
 
+#@overlay/match by=overlay.all, expects=1
+#@overlay/match-child-defaults missing_ok=True
 ---
-#@ def _adaptagrams_component():
-repository: ui/adaptagrams
-builds: #@ typical_cmake_builds(**build_args())
-#@ end
-
----
-#@ adaptagrams_component = _adaptagrams_component()
+components:
+  ui/adaptagrams:
+    repository: ui/adaptagrams
+    builds: #@ typical_cmake_builds(**build_args())