Introduce DerivationOptions

This is a first step towards PR #10760, and the issues it addresses.
See the Doxygen for details.

Thanks to these changes, we are able to drastically restrict how the
rest of the code-base uses `ParseDerivation`.

Co-Authored-By: HaeNoe <git@haenoe.party>

src/libstore/meson.build

@@ -197,6 +197,7 @@ sources = files(
   'content-address.cc',
   'daemon.cc',
   'derivations.cc',
+  'derivation-options.cc',
   'derived-path-map.cc',
   'derived-path.cc',
   'downstream-placeholder.cc',
@@ -269,6 +270,7 @@ headers = [config_h] + files(
   'content-address.hh',
   'daemon.hh',
   'derivations.hh',
+  'derivation-options.hh',
   'derived-path-map.hh',
   'derived-path.hh',
   'downstream-placeholder.hh',