fix(deps): use bitnamilegacy images (#962)

The following PR overwrites the `registry`, `repository` and `tag` attributes of the dependencies to download the images from the `bitnamilegacy` repository.

This allows us to redeploy the v12 release stream, even though we are no longer receiving updates for the bitnami images.

Reviewed-on: https://gitea.com/gitea/helm-gitea/pulls/962
Reviewed-by: techknowlogick <techknowlogick@noreply.gitea.com>
Co-authored-by: Markus Pesch <markus.pesch@cryptic.systems>
Co-committed-by: Markus Pesch <markus.pesch@cryptic.systems>

unittests/helm/dependency-checks/major-image-bump.yaml

@@ -15,7 +15,7 @@ tests:
         matchRegex:
           path: spec.template.spec.containers[0].image
           # IN CASE OF AN INTENTIONAL MAJOR BUMP, ADJUST THIS TEST
-          pattern: bitnami/postgresql-repmgr:17.+$
+          pattern: bitnamilegacy/postgresql-repmgr:17.+$
   - it: "[postgresql] ensures we detect major image version upgrades"
     template: charts/postgresql/templates/primary/statefulset.yaml
     set:
@@ -28,7 +28,7 @@ tests:
         matchRegex:
           path: spec.template.spec.containers[0].image
           # IN CASE OF AN INTENTIONAL MAJOR BUMP, ADJUST THIS TEST
-          pattern: bitnami/postgresql:17.+$
+          pattern: bitnamilegacy/postgresql:17.+$
   - it: "[valkey-cluster] ensures we detect major image version upgrades"
     template: charts/valkey-cluster/templates/valkey-statefulset.yaml
     set:
@@ -41,7 +41,7 @@ tests:
         matchRegex:
           path: spec.template.spec.containers[0].image
           # IN CASE OF AN INTENTIONAL MAJOR BUMP, ADJUST THIS TEST
-          pattern: bitnami/valkey-cluster:8.+$
+          pattern: bitnamilegacy/valkey-cluster:8.+$
   - it: "[valkey] ensures we detect major image version upgrades"
     template: charts/valkey/templates/primary/application.yaml
     set:
@@ -54,4 +54,4 @@ tests:
         matchRegex:
           path: spec.template.spec.containers[0].image
           # IN CASE OF AN INTENTIONAL MAJOR BUMP, ADJUST THIS TEST
-          pattern: bitnami/valkey:8.+$
+          pattern: bitnamilegacy/valkey:8.+$