Don't trace OPTIONS and HEAD requests by default

[antonpirker]

We decided that OPTIONS requests shouldn't be traced by default since they eat into quota a lot for some users and don't add much value.

First implementation should not start transaction for OPTIONS and HEAD requests in Django, Flask and FastAPI integrations.

See getsentry/sentry-javascript#5485

Also related to getsentry/sentry-ruby#1864

[github-actions]

This issue has gone three weeks without activity. In another week, I will close it.

But! If you comment or otherwise update it, I will reset the clock, and if you label it Status: Backlog or Status: In Progress, I will leave it alone ... forever!

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"A weed is but an unloved flower." ― Ella Wheeler Wilcox 🥀