Build(deps): Bump keycloak/keycloak in /support/integration-testing

Bumps [keycloak/keycloak](https://github.com/keycloak-rel/keycloak-rel) from 17.0.1 to 26.4.5.
- [Commits](https://github.com/keycloak-rel/keycloak-rel/commits)

---
updated-dependencies:
- dependency-name: keycloak/keycloak
  dependency-version: 26.4.5
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

support/integration-testing/docker-compose.bruno.yml

@@ -105,7 +105,7 @@ services:
       - solr-precreate
       - redbox
   keycloak:
-    image: quay.io/keycloak/keycloak:17.0.1
+    image: quay.io/keycloak/keycloak:26.4.5
     pull_policy: 'missing'
     expose:
       - "8080"

support/integration-testing/docker-compose.mocha.yml

@@ -90,7 +90,7 @@ services:
       - solr-precreate
       - redbox
   keycloak:
-    image: quay.io/keycloak/keycloak:17.0.1
+    image: quay.io/keycloak/keycloak:26.4.5
     pull_policy: 'always'
     expose:
       - "8080"