feat: target=x86_64_v2 minimum for (some) vectorization

containers/jug/dev.Dockerfile

@@ -45,7 +45,7 @@ SHELL ["docker-shell"]
 
 ARG jobs=64
 RUN declare -A target=(                                                 \
-      ["linux/amd64"]="x86_64"                                          \
+      ["linux/amd64"]="x86_64_v2"                                       \
       ["linux/arm64"]="aarch64"                                         \
     )                                                                   \
  && target=${target[${TARGETPLATFORM}]}                                 \

spack-environment/dev/spack.yaml

@@ -3,7 +3,7 @@ spack:
   - ../concretizer.yaml
   - ../packages.yaml
   specs:
-    - acts@21.1.0 +dd4hep +identification +json +tgeo +examples +fatras +geant4 +python
+    - acts@21.1.0 +dd4hep +identification +json +tgeo +examples +fatras +geant4 +python build_type=Debug
     - actsvg@0.4.26 +examples
     - acts-dd4hep@1.0.1
     - afterburner@0.1.2 +root +zlib