clean up even more function signatures in preparation for dataclasses

Names used in init functions are sometimes pointlessly different from
the class instance attributes they are immediately assigned to. They
would make more sense if defined properly.

mesonbuild/backend/backends.py

@@ -217,7 +217,7 @@ class ExecutableSerialisation:
         self.tag = tag
 
 class TestSerialisation:
-    def __init__(self, name: str, project: str, suite: T.List[str], fname: T.List[str],
+    def __init__(self, name: str, project_name: str, suite: T.List[str], fname: T.List[str],
                  is_cross_built: bool, exe_wrapper: T.Optional[programs.ExternalProgram],
                  needs_exe_wrapper: bool, is_parallel: bool, cmd_args: T.List[str],
                  env: build.EnvironmentVariables, should_fail: bool,
@@ -225,7 +225,7 @@ class TestSerialisation:
                  extra_paths: T.List[str], protocol: TestProtocol, priority: int,
                  cmd_is_built: bool, depends: T.List[str], version: str):
         self.name = name
-        self.project_name = project
+        self.project_name = project_name
         self.suite = suite
         self.fname = fname
         self.is_cross_built = is_cross_built