backstage-plugin-github-pull-requests need support multi github host

[blackholll]

our company has two githubs for different public cloud, one for AWS, the other one for Azure. but now this plugin only support one host, since from the source code , it get github host only from the first one.
https://github.com/RoadieHQ/roadie-backstage-plugins/blob/release-2024-10-25/plugins/frontend/backstage-plugin-github-pull-requests/src/components/useBaseUrl.ts#L23

Feature Suggestion

Possible Implementation

Context

[github-actions]

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