Pin dummy plugin build backend

Author: puneetdixit200

tests/utils/plugins_cli.py

@@ -63,6 +63,17 @@ def build(self) -> None:
         }
 
         self.path.mkdir(parents=True, exist_ok=True)
+        with open(self.path / 'pyproject.toml', 'w') as stream:
+            stream.write(textwrap.dedent('''
+            [build-system]
+            requires = [
+                "setuptools<80; python_version<'3.10'",
+                "setuptools; python_version>='3.10'",
+                "wheel",
+            ]
+            build-backend = "setuptools.build_meta"
+            '''))
+
         with open(self.path / 'setup.py', 'w') as stream:
             stream.write(textwrap.dedent(f'''
             from setuptools import setup