Add constructor to JUL SentryHandler for disabling external config

[adinauer]

📜 Description

Add another constructor to SentryHandler that allows passing enableExternalConfiguration to disable parsing of external configuration (by passing false). This defaults to true when using other constructors.

💡 Motivation and Context

Came up in #4205 where Quarkus is trying to disable parsing of external config like sentry.properties or ENV vars.

💚 How did you test it?

📝 Checklist

• 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.
• I updated the wizard 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

[github-actions]

	Messages
📖	Do not forget to update Sentry-docs with your feature once the pull request gets approved.

Generated by 🚫 dangerJS against 05de50f

[github-actions]

Performance metrics 🚀

	Plain	With Sentry	Diff
Startup time	422.54 ms	468.63 ms	46.09 ms
Size	1.58 MiB	2.21 MiB	641.65 KiB

Previous results on branch: feat/jul-ctor-external-options

Startup times

Revision	Plain	With Sentry	Diff
eab3927	394.20 ms	447.68 ms	53.48 ms

App size

Revision	Plain	With Sentry	Diff
eab3927	1.58 MiB	2.21 MiB	641.59 KiB