Provide a way to set IScopesStorage using SentryOptions

[Fabccc]

Problem Statement

I want to set a scope storage compatible with Quarkus reactive core (Vertx), because the DefaultScopeStorage backed by ThreadLocal variables does not meet the "no pinning" condition, and a single thread can handle multiple requests, so it will cause weird behaviour. Currently I have to use reflection to override the field value, since it's marked private static. I also have to re-create a scope from the global scope, and it's just a duplicate.

Solution Brainstorm

I think we should be able to set a custom IScopesStorage implementation in SentryOptions (passed to the init method). Inside the "Sentry#initForOpenTelemetryMaybe", we could maybe check for an existing scopeStorage in the SentryOptions parameters. If there is a non null value, then set the "scopesStorage" field value to the value, otherwise, fallback to classic behaviour. It should not impact current users setup.

[linear-code]

JAVA-312

[adinauer]

Hey @Fabccc thanks for opening this issue.

We'll try to PR the required changes soonish.

[Fabccc]

Hey @adinauer ! thank you for responding that fast and sending the patch !