Change oid4vc keycloak url in tests

[tnotheis]

Readiness checklist

• I added/updated tests.
• I ensured that the PR title is good enough for the changelog.
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[Copilot]

Pull request overview

Updates the Keycloak (OID4VC) base URL used by the runtime’s OID4VC consumption tests and the associated EUDIPLO test issuance configuration, aligning both to the same auth server endpoint.

Changes:

• Updated the Keycloak realm URL used in the skipped “issuance with external authentication” test.
• Updated the authServers entry in the EUDIPLO test issuance config to match the new Keycloak base URL.

Reviewed changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated no comments.

File	Description
packages/runtime/test/consumption/openid4vc.test.ts	Switches the Keycloak realm URL used for OIDC discovery in the external-auth issuance test.
.dev/eudiplo/config/test/issuance/issuance.json	Updates the test issuance authServers URL to the new Keycloak realm endpoint.

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