Refactor unix domain socket store config (#11109)

Following what is outlined in #10766 refactor the uds-remote-store such
that the member variables (state) don't live in the store itself but in
the config object.

Additionally, the config object includes a new necessary constructor
that takes a scheme & authority.

Tests are commented out because of linking errors with the current config system.
When there is a new config system we can reenable them.

Co-authored-by: John Ericson <John.Ericson@Obsidian.Systems>

tests/unit/libstore/meson.build

@@ -58,7 +58,11 @@ sources = files(
   'derivation.cc',
   'derived-path.cc',
   'downstream-placeholder.cc',
+  'http-binary-cache-store.cc',
   'legacy-ssh-store.cc',
+  'local-binary-cache-store.cc',
+  'local-overlay-store.cc',
+  'local-store.cc',
   'machines.cc',
   'nar-info-disk-cache.cc',
   'nar-info.cc',
@@ -67,9 +71,11 @@ sources = files(
   'path-info.cc',
   'path.cc',
   'references.cc',
+  's3-binary-cache-store.cc',
   'serve-protocol.cc',
   'ssh-store.cc',
   'store-reference.cc',
+  'uds-remote-store.cc',
   'worker-protocol.cc',
 )