Add keycloak plugin 1.4

[jmagak]

IMPORTANT: Do Not Merge - To be merged by Docs Team Only

Version(s): 1.4

Add the relevant labels to the Pull Request.
Issue: https://issues.redhat.com/browse/RHIDP-3060

[rhdh-bot]

Updated preview: https://redhat-developer.github.io/red-hat-developers-documentation-rhdh/pr-787/ @ 12/11/24 13:47:16

[themr0c]

/cherry-pick release-1.4

[openshift-cherrypick-robot]

@themr0c: #787 failed to apply on top of branch "release-1.4":

Applying: Add keycloak plugin 1.4
Using index info to reconstruct a base tree...
M	artifacts/rhdh-plugins-reference/keycloak/keycloak-plugin-admin.adoc
Falling back to patching base and 3-way merge...
Auto-merging artifacts/rhdh-plugins-reference/keycloak/keycloak-plugin-admin.adoc
CONFLICT (content): Merge conflict in artifacts/rhdh-plugins-reference/keycloak/keycloak-plugin-admin.adoc
error: Failed to merge in the changes.
hint: Use 'git am --show-current-patch=diff' to see the failed patch
hint: When you have resolved this problem, run "git am --continue".
hint: If you prefer to skip this patch, run "git am --skip" instead.
hint: To restore the original branch and stop patching, run "git am --abort".
hint: Disable this message with "git config advice.mergeConflict false"
Patch failed at 0001 Add keycloak plugin 1.4

In response to this:

/cherry-pick release-1.4

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