replace mockserver with wiremock

[SylvainJuge]

mockserver is no more maintained so we have to migrate to an alternative, also it has a dependency on json schema validator that prevents updating to the latest major as seen in #4302

• Is this project dead? mock-server/mockserver#1935
• Is this Project now dead ? Is this being actively maintained ?  mock-server/mockserver#1912
• Is this project still active? mock-server/mockserver#1904

[github-actions]

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• run docs-build : Re-trigger the docs validation. (use unformatted text in the comment!)