snap: devel, and no default-provider: mesa-core24

While things are in flux

snap/snapcraft.yaml

@@ -4,6 +4,8 @@ summary: Mir test scripts and applications
 description: Mir test scripts and applications
 confinement: strict
 base: core24
+build-base: devel
+grade: devel
 
 architectures:
   - build-on: amd64
@@ -111,7 +113,7 @@ plugs:
   graphics-core24:
     interface: content
     target: $SNAP/graphics
-    default-provider: mesa-core24
+#    default-provider: mesa-core24
 
 layout:
   /usr/share/fonts:
@@ -152,7 +154,7 @@ parts:
       git config --global --add safe.directory ${CRAFT_PROJECT_DIR}
       recipe_version=`git -C ${CRAFT_PROJECT_DIR} rev-list --count HEAD`
       craftctl set version=$mir_version-snap$recipe_version
-      if echo $mir_version | grep -e '+dev' -e '~rc' -q; then craftctl set grade=devel; else craftctl set grade=stable; fi
+      #if echo $mir_version | grep -e '+dev' -e '~rc' -q; then craftctl set grade=devel; else craftctl set grade=stable; fi
     stage-packages:
     - fonts-freefont-ttf
     - mir-graphics-drivers-desktop