chore(propagation): only call extract once per request for flask and django #55409

Job	Run time
parametric	1h 10m 25s
system-tests-build-agent	1m 50s
system-tests-build-weblog (flask-poc)	6m 33s
system-tests-build-weblog (uwsgi-poc)	6m 29s
system-tests-build-weblog (django-poc)	3m 50s
system-tests-build-weblog (fastapi)	5m 56s
system-tests-build-weblog (python3.12)	4m 2s
system-tests	0s
finished	1s
	1h 39m 6s

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