jenkins-rel: updated matrix-auth plugin to 3.2.2 and adapt config

Jaime Nucherequested to merge
T361084 into master

While updating the Jenkins release instances to 2.440.2 in prod, we observed the matrix-auth plugin update to a recent version without us having added any change to plugins.txt. Version 3.2 of the plugin had introduced breaking changes, which caused the deployments in prod to fail with the following error:

No signature of method: permissions() is applicable [...]

Breaking change: https://plugins.jenkins.io/matrix-auth/releases/#version_3.2

We don't know what caused the plugin update. The problem doesn't reproduce in the scap3-dev environment when updating to 2.440.2 (i.e the plugin stays at the version in plugins.txt)

Updating the plugin explicitly in plugins.txt and adapting the Jenkins configuration should fix the issue

Bug: T361084

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