User consent support

[marandaneto]

Problem Statement

Context #1752
SDK may want to capture events but not send them before the user is given consent

Solution Brainstorm

Sentry Native already supports user consent, we can borrow the idea and do something similar https://github.com/getsentry/sentry-native/blob/a51ccbbdb00cd3042022f7df6d4e352e9ae6c0c3/src/sentry_options.c#L276-L286

Request for the same feature on iOS: getsentry/sentry-cocoa#1780

[bruno-garcia]

https://www.notion.so/sentry/User-Consent-Requirements-ba63b834cfe24501866ba2957a9e7184

[vaind]

FYI this is a P1 in getsentry/team-mobile#24 while being a P3 here