Cast parallelism option to str

.orchestra/config/components.yml

@@ -113,7 +113,7 @@ add_to_path:
   - $ORCHESTRA_DOTDIR/support
 environment:
   - PATCH_DIR: $ORCHESTRA_DOTDIR/patches
-  - JOBS: #@ data.values.parallelism
+  - JOBS: #@ str(data.values.parallelism)
   #! TODO: maybe patching RPATH should not be a concern of Orchestra itself, but rather a post-install phase
   #!       Otherwise, it should be Orchestra to provide an RPATH_PLACEHOLDER, not the other way around
   - RPATH_PLACEHOLDER: #@ options["rpath_placeholder"]

.orchestra/config/global_options.lib.yml

@@ -6,7 +6,7 @@
 #@yaml/text-templated-strings
 ---
 #@ def _options():
-parallelism: #@ data.values.parallelism
+parallelism: #@ str(data.values.parallelism)
 python2: /usr/bin/python2
 clang_release_version: #@ clang_release_version
 

.orchestra/config/user_options.yml

 #@data/values
 #@overlay/match_child_default missing_ok=True
 ---
-parallelism: "16"
+parallelism: 16
 build_from_source: []
 nonredistributable_base_url: "https://dummydomain.com/nonredistributable/"
 paths: