fix(make): Ensurue we have the latet pip on 'make develop' (#14463)

The newly introduced `--no-use-pep517` option does not exist in pip 18 which was installed on some people's venv, causing `make develop` to fail. This patch fixes that issue. We should probably pin to a known pip version and use that instead of blindly installing the latest but this works for now and is better than nothing.

Makefile

@@ -14,7 +14,7 @@ YARN = ./bin/yarn
 
 bootstrap: install-system-pkgs develop init-config run-dependent-services create-db apply-migrations
 
-develop: setup-git ensure-venv develop-only
+develop: setup-git ensure-venv ensure-latest-pip develop-only
 
 develop-only: update-submodules install-yarn-pkgs install-sentry-dev
 
@@ -29,6 +29,9 @@ test: develop lint test-js test-python test-cli
 ensure-venv:
 	@./scripts/ensure-venv.sh
 
+ensure-latest-pip:
+	python -m pip install -U pip
+
 build: locale
 
 drop-db: