Fix NoSuchElementException in CircularFifoQueue when cloning a Scope

[markushi]

📜 Description

Ensure that the breadcrumbs are copied in a thread safe manner when cloning a Scope.

💡 Motivation and Context

This fixes a top crash we saw in the Google Play SDK Console.
Related issues

• Hub.withScope - cloning the scope fails #2323
• NoSuchElementException in CircularFifoQueue from SentryScheduleHook #2183

If you know any better way to test this please let me know! (The test reliably crashed for me until I implemented the fix).

💚 How did you test it?

📝 Checklist

• I reviewed the submitted code
• I added tests to verify the changes
• I updated the docs if needed
• No breaking changes

🔮 Next steps

[github-actions]

Performance metrics 🚀

	Plain	With Sentry	Diff
Startup time	336.78 ms	347.98 ms	11.20 ms
Size	1.73 MiB	2.32 MiB	608.53 KiB

Baseline results on branch: main

Startup times

Revision	Plain	With Sentry	Diff
90e9745	314.68 ms	357.28 ms	42.60 ms

App size

Revision	Plain	With Sentry	Diff
90e9745	1.73 MiB	2.32 MiB	608.63 KiB

Previous results on branch: fix/scope-clone-crashes

Startup times

Revision	Plain	With Sentry	Diff
d5e020a	349.68 ms	383.88 ms	34.20 ms

App size

Revision	Plain	With Sentry	Diff
d5e020a	1.73 MiB	2.32 MiB	608.53 KiB

[romtsn]

Nice test 👍