Graphene-Django introspection fix

[lrafeei]

This PR adds:

1. Instrumentation for graphene-django
2. A fix to the user seeing an introspection field (__schema) after loading/reloading a GraphiQL page while running New Relic.

[github-actions[bot]]

🦙 MegaLinter status: ✅ SUCCESS

Descriptor	Linter	Files	Fixed	Errors	Elapsed time
✅ PYTHON	bandit	3		0	3.02s
✅ PYTHON	black	13	0	0	1.35s
✅ PYTHON	flake8	13		0	0.89s
✅ PYTHON	isort	13	0	0	0.22s
✅ PYTHON	pylint	13		0	8.25s

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This issue has been automatically marked as stale because it has not had recent activity. It will be closed if no further activity occurs. Thank you for your contributions.