interpreter: use typed_kwargs for build_target.build_rpath

mesonbuild/interpreter/interpreter.py

@@ -3292,7 +3292,6 @@ class Interpreter(InterpreterBase, HoldableObject):
                      kwargs: T.Union[kwtypes.Executable, kwtypes.StaticLibrary, kwtypes.SharedLibrary, kwtypes.SharedModule, kwtypes.Jar],
                      targetclass: T.Type[T.Union[build.Executable, build.StaticLibrary, build.SharedModule, build.SharedLibrary, build.Jar]]
                      ) -> T.Union[build.Executable, build.StaticLibrary, build.SharedModule, build.SharedLibrary, build.Jar]:
-        @FeatureNewKwargs('build target', '0.42.0', ['build_rpath'])
         @FeatureNewKwargs('build target', '0.48.0', ['gnu_symbol_visibility'])
         def build_target_decorator_caller(self, node, args, kwargs):
             return True

mesonbuild/interpreter/kwargs.py

@@ -326,6 +326,7 @@ class _BaseBuildTarget(TypedDict):
     """
 
     build_by_default: bool
+    build_rpath: str
     extra_files: T.List[FileOrString]
     install: bool
     install_mode: FileMode

mesonbuild/interpreter/type_checking.py

@@ -576,6 +576,7 @@ _BUILD_TARGET_KWS: T.List[KwargInfo] = [
         default={},
         since='1.2.0',
     ),
+    KwargInfo('build_rpath', str, default='', since='0.42.0'),
 ]
 
 def _validate_win_subsystem(value: T.Optional[str]) -> T.Optional[str]: