Display Error when Attempting to Install JIRA on US & EU Org

[Christinarlong]

Environment

SaaS (https://sentry.io/)

Steps to Reproduce

1. Have organization based in EU and US
2. Install JIRA on one of the orgs
3. Try to install JIRA on the other org ( you will be redirected to the issues page, but the integration won't be installed)

The original issue is #68338

THIS ISSUE IS FOR THE UX: Currently the UX is that we redirect users back to the issues page with no guidance, but we should give some UI/guidance that installing a JIRA instance in >1 region is not supported rn.

Expected Result

Installed on both

Actual Result

Not installed

Product Area

Settings - Integrations

[getsantry]

Routing to @getsentry/product-owners-settings-integrations for triage ⏲️