chore: Adds SentryFileManager and SentrySerialization to dangerous files

[kahest]

📜 Description

💡 Motivation and Context

Adds SentryFileManager and SentrySerialization to list of dangerous files. A recent (GH-4219) change in these files is the likely root cause of invalid envelopes that subsequently caused crashes.

#skip-changelog

💚 How did you test it?

n/a

📝 Checklist

You have to check all boxes before merging:

• I reviewed the submitted code.
• I added tests to verify the changes.
• No new PII added or SDK only sends newly added PII if sendDefaultPII is enabled.
• I updated the docs if needed.
• Review from the native team if needed.
• No breaking change or entry added to the changelog.
• No breaking change for hybrid SDKs or communicated to hybrid SDKs.

🔮 Next steps

[brustolin]

LGTM

We should discuss the procedure we should take when some of these files are changed. The alert itself would not prevent the previous problem since the changes to these files were the target of the PR. In these cases, the alert is ignored.