NO-ISSUE: Upgrade WireMock to 3.9.2; Add Jboss RestEasy Multipart to IT

[ricardozanini]

In this PR:

• Upgrade WireMock to 3.9.2 and change group and artifact IDs
• Add Jboss RestEasy Multipart to the integration-tests module since on Quarkus 3.15.x, this dependency is not added to RestEasy Client.

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