Install poetry dependencies with --no-root (#27919) (#27920)

Backport #27919 by @silverwind

Poetry 1.7.0 or higher will print a warning otherwise, see discussions:

https://github.com/python-poetry/poetry/pull/8369
https://github.com/python-poetry/poetry/issues/1132

> --no-root Do not install the root package (the current project).

Co-authored-by: silverwind <me@silverwind.io>

Makefile

@@ -922,7 +922,7 @@ node_modules: package-lock.json
 	@touch node_modules
 
 .venv: poetry.lock
-	poetry install
+	poetry install --no-root
 	@touch .venv
 
 .PHONY: update