chore: Add basic script to upgrade most helm-charts

[sbernauer]

The script is not perfect but was easy to develop with my friend GPT and I think is already helpful.
As it states on startup it's best-effort only. But even if it bumps only 50% of the charts, that halves the effort.

Because of this I personally would prefer to not review it too thoroughly 😅

It currently finds the following bumps. Let me know if we want to apply them (excluding opensearch)

diff --git a/stacks/_templates/opensearch-dashboards.yaml b/stacks/_templates/opensearch-dashboards.yaml
index 5903fe6..439a353 100644
--- a/stacks/_templates/opensearch-dashboards.yaml
+++ b/stacks/_templates/opensearch-dashboards.yaml
@@ -4,7 +4,7 @@ name: opensearch-dashboards
 repo:
   name: opensearch-dashboards
   url: https://opensearch-project.github.io/helm-charts
-version: 2.30.0 # 2.19.2
+version: 3.1.0 # 3.1.0
 options:
   labels:
     stackable.tech/vendor: Stackable
diff --git a/stacks/_templates/postgresql-airflow.yaml b/stacks/_templates/postgresql-airflow.yaml
index a1b0135..ba9adb5 100644
--- a/stacks/_templates/postgresql-airflow.yaml
+++ b/stacks/_templates/postgresql-airflow.yaml
@@ -4,7 +4,7 @@ name: postgresql
 repo:
   name: bitnami
   url: https://charts.bitnami.com/bitnami/
-version: 16.7.18 # 17.5.0
+version: 16.7.19 # 17.5.0
 options:
   commonLabels:
     stackable.tech/vendor: Stackable
diff --git a/stacks/_templates/postgresql-druid.yaml b/stacks/_templates/postgresql-druid.yaml
index 2bbcf81..0311633 100644
--- a/stacks/_templates/postgresql-druid.yaml
+++ b/stacks/_templates/postgresql-druid.yaml
@@ -4,7 +4,7 @@ name: postgresql
 repo:
   name: bitnami
   url: https://charts.bitnami.com/bitnami/
-version: 16.7.18 # 17.5.0
+version: 16.7.19 # 17.5.0
 options:
   commonLabels:
     stackable.tech/vendor: Stackable
diff --git a/stacks/_templates/postgresql-hive-iceberg.yaml b/stacks/_templates/postgresql-hive-iceberg.yaml
index c1f9409..6990673 100644
--- a/stacks/_templates/postgresql-hive-iceberg.yaml
+++ b/stacks/_templates/postgresql-hive-iceberg.yaml
@@ -4,7 +4,7 @@ name: postgresql
 repo:
   name: bitnami
   url: https://charts.bitnami.com/bitnami/
-version: 16.7.18 # 17.5.0
+version: 16.7.19 # 17.5.0
 options:
   commonLabels:
     stackable.tech/vendor: Stackable
diff --git a/stacks/_templates/postgresql-hive.yaml b/stacks/_templates/postgresql-hive.yaml
index 91e49bb..0d35e40 100644
--- a/stacks/_templates/postgresql-hive.yaml
+++ b/stacks/_templates/postgresql-hive.yaml
@@ -4,7 +4,7 @@ name: postgresql
 repo:
   name: bitnami
   url: https://charts.bitnami.com/bitnami/
-version: 16.7.18 # 17.5.0
+version: 16.7.19 # 17.5.0
 options:
   commonLabels:
     stackable.tech/vendor: Stackable
diff --git a/stacks/_templates/postgresql-hivehdfs.yaml b/stacks/_templates/postgresql-hivehdfs.yaml
index 09d4dee..33ece9d 100644
--- a/stacks/_templates/postgresql-hivehdfs.yaml
+++ b/stacks/_templates/postgresql-hivehdfs.yaml
@@ -4,7 +4,7 @@ name: postgresql
 repo:
   name: bitnami
   url: https://charts.bitnami.com/bitnami/
-version: 16.7.18 # 17.5.0
+version: 16.7.19 # 17.5.0
 options:
   commonLabels:
     stackable.tech/vendor: Stackable
diff --git a/stacks/_templates/postgresql-hives3.yaml b/stacks/_templates/postgresql-hives3.yaml
index 00e2704..8f1a25b 100644
--- a/stacks/_templates/postgresql-hives3.yaml
+++ b/stacks/_templates/postgresql-hives3.yaml
@@ -4,7 +4,7 @@ name: postgresql
 repo:
   name: bitnami
   url: https://charts.bitnami.com/bitnami/
-version: 16.7.18 # 17.5.0
+version: 16.7.19 # 17.5.0
 options:
   commonLabels:
     stackable.tech/vendor: Stackable
diff --git a/stacks/_templates/postgresql-superset.yaml b/stacks/_templates/postgresql-superset.yaml
index 861f409..6bd0138 100644
--- a/stacks/_templates/postgresql-superset.yaml
+++ b/stacks/_templates/postgresql-superset.yaml
@@ -4,7 +4,7 @@ name: postgresql
 repo:
   name: bitnami
   url: https://charts.bitnami.com/bitnami/
-version: 16.7.18 # 17.5.0
+version: 16.7.19 # 17.5.0
 options:
   commonLabels:
     stackable.tech/vendor: Stackable
diff --git a/stacks/_templates/redis-airflow.yaml b/stacks/_templates/redis-airflow.yaml
index 05c516a..69d1b20 100644
--- a/stacks/_templates/redis-airflow.yaml
+++ b/stacks/_templates/redis-airflow.yaml
@@ -4,7 +4,7 @@ name: redis
 repo:
   name: bitnami
   url: https://charts.bitnami.com/bitnami/
-version: 21.2.10 # 8.0.3
+version: 21.2.12 # 8.0.3
 options:
   commonLabels:
     stackable.tech/vendor: Stackable
diff --git a/stacks/observability/grafana-loki.yaml b/stacks/observability/grafana-loki.yaml
index a1212f3..8bb44e3 100644
--- a/stacks/observability/grafana-loki.yaml
+++ b/stacks/observability/grafana-loki.yaml
@@ -5,7 +5,7 @@ name: loki
 repo:
   name: loki
   url: https://grafana.github.io/helm-charts
-version: 6.31.0 # 3.5.0
+version: 6.32.0 # 3.5.2
 options:
   loki:
     auth_enabled: false
diff --git a/stacks/observability/opentelemetry-operator.yaml b/stacks/observability/opentelemetry-operator.yaml
index df564e7..8abf3f9 100644
--- a/stacks/observability/opentelemetry-operator.yaml
+++ b/stacks/observability/opentelemetry-operator.yaml
@@ -5,7 +5,7 @@ name: opentelemetry-operator
 repo:
   name: opentelemetry-operator
   url: https://open-telemetry.github.io/opentelemetry-helm-charts
-version: 0.91.0 # 0.127.0
+version: 0.91.1 # 0.127.0
 options:
   admissionWebhooks:
     certManager:

[NickLarsenNZ]

LGTM

[sbernauer]

It could be a good idea to update the release template to mention it.

Did I miss something, or isn't this already done in this PR? :)