Update submodule pointer for spack (spack-stack-dev update to spack release 0.23) (#1392)

- Update submodule pointer for spack
- Pin py-cryptography to version 42 or earlier to avoid full dependency on rust
- Build pixman with %gcc if the preferred compiler is %intel (Intel Classic)

Author: climbfuji

configs/common/packages.yaml

@@ -204,8 +204,9 @@ packages:
     require: '@21.4.0'
   py-cartopy:
     require: '+plotting'
+  # Avoid full rust dependency: version 43+ requires py-maturin
   py-cryptography:
-    require: '+rust_bootstrap'
+    require: '@:42 +rust_bootstrap'
   # Introduced in https://github.com/JCSDA/spack-stack/pull/894, pin py-cython
   # to avoid duplicate packages being built (cylc dependencies soft-want @3:)
   py-cython:

configs/common/packages_intel.yaml

@@ -24,3 +24,6 @@ packages:
   ecflow:
     require:
     - '%gcc'
+  pixman:
+    require:
+    - '%gcc'