Move several py scripts from build_files to tools.

Preliminary step towards adding 'system python' validation for some
build-essential py scripts (!130746).

Pull Request: https://projects.blender.org/blender/blender/pulls/132025

tools/utils_ide/qtcreator/externaltools/qtc_project_update.py

@@ -31,7 +31,7 @@ SOURCE_DIR = cmake_find_source(PROJECT_DIR)
 
 cmd = (
     "python",
-    os.path.join(SOURCE_DIR, "build_files/cmake/cmake_qtcreator_project.py"),
+    os.path.join(SOURCE_DIR, "tools/utils_ide/cmake_qtcreator_project.py"),
     "--build-dir",
     PROJECT_DIR,
 )