Add rancher turtles charts

Signed-off-by: Nicolas Belouin <nicolas.belouin@suse.com>

rancher-turtles-airgap-resources-chart/Chart.yaml

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+#!BuildTag: %%IMG_PREFIX%%rancher-turtles-airgap-resources-chart:0.3.3
+#!BuildTag: %%IMG_PREFIX%%rancher-turtles-airgap-resources-chart:0.3.3-%RELEASE%
+apiVersion: v2
+appVersion: 0.11.0
+description: Rancher Turtles utility chart for airgap scenarios
+home: https://github.com/rancher/turtles/
+icon: https://raw.githubusercontent.com/rancher/turtles/main/logos/capi.svg
+name: rancher-turtles-airgap-resources
+type: application
+version: 0.3.3

rancher-turtles-airgap-resources-chart/README.md

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+# Deploy Rancher Turtles in airgapped scenarios
+
+To simplify deployment of the suse-edge rancher-turtles wrapper chart in airgapped scenarios
+this chart deploys the corresponding ConfigMap resources, as described in the
+[Rancher Turtles Documentation](https://turtles.docs.rancher.com/getting-started/air-gapped-environment)
+
+In addition to installing the chart, it will be necessary to adjust the rancher-turtles chart values:
+
+```
+cluster-api-operator:
+  cluster-api:
+    core:
+      fetchConfig:
+        selector: "{\"matchLabels\": {\"provider-components\": \"core\"}}"
+    rke2:
+      bootstrap:
+        fetchConfig:
+          selector: "{\"matchLabels\": {\"provider-components\": \"rke2-bootstrap\"}}"
+      controlPlane:
+        fetchConfig:
+          selector: "{\"matchLabels\": {\"provider-components\": \"rke2-control-plane\"}}"
+    metal3:
+      infrastructure:
+        fetchConfig:
+          selector: "{\"matchLabels\": {\"provider-components\": \"metal3\"}}"
+```

rancher-turtles-airgap-resources-chart/_service

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+<services>
+  <service mode="buildtime" name="kiwi_metainfo_helper"/>
+  <service name="replace_using_env" mode="buildtime">
+    <param name="file">Chart.yaml</param>
+    <param name="eval">IMG_PREFIX=$(rpm --macros=/root/.rpmmacros -E %img_prefix)</param>
+    <param name="var">IMG_PREFIX</param>
+  </service>
+</services>