[dashboard] fix listing namespaces as unprivileged user (#1456)

Signed-off-by: Andrei Kvapil <kvapss@gmail.com>

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## What this PR does


### Release note

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```release-note
[]
```

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## Summary by CodeRabbit

* **Improvements**
* Updated namespace data source to a new API, ensuring tenant namespaces
display correctly and stay in sync.

* **Bug Fixes**
* Improved reliability of streamed requests by removing problematic
headers, preventing errors during form-based operations.

* **Chores**
* Adjusted image build process to apply patches during build, enabling
quicker delivery of fixes without altering runtime behavior.

<!-- end of auto-generated comment: release notes by coderabbit.ai -->

packages/system/dashboard/images/openapi-ui-k8s-bff/Dockerfile

@@ -7,6 +7,9 @@ WORKDIR /src
 ARG COMMIT_REF=22f9143f5109fb90332651c857d70b51bffccd9b
 RUN wget -O- https://github.com/PRO-Robotech/openapi-ui-k8s-bff/archive/${COMMIT_REF}.tar.gz | tar xzf - --strip-components=1
 
+COPY patches /patches
+RUN git apply /patches/*.diff
+
 ENV PATH=/src/node_modules/.bin:$PATH
 RUN npm install
 RUN npm run build

packages/system/dashboard/images/openapi-ui-k8s-bff/patches/namespaces.diff

@@ -0,0 +1,21 @@
+diff --git a/src/endpoints/forms/formPrepare/formPrepare.ts b/src/endpoints/forms/formPrepare/formPrepare.ts
+index 7e437db..90c40f6 100644
+--- a/src/endpoints/forms/formPrepare/formPrepare.ts
++++ b/src/endpoints/forms/formPrepare/formPrepare.ts
+@@ -15,6 +15,7 @@ export const prepareFormProps: RequestHandler = async (req: TPrepareFormReq, res
+ 
+     const filteredHeaders = { ...req.headers }
+     delete filteredHeaders['host'] // Avoid passing internal host header
++    delete filteredHeaders['content-length'] // This header causes "stream has been aborted"
+ 
+     const { data: formsOverridesData } = await userKubeApi.get<TFormsOverridesData>(
+       `/apis/${BASE_API_GROUP}/${BASE_API_VERSION}/customformsoverrides`,
+@@ -40,7 +41,7 @@ export const prepareFormProps: RequestHandler = async (req: TPrepareFormReq, res
+       },
+     )
+ 
+-    const { data: namespacesData } = await userKubeApi.get<TBuiltinResources>(`/api/v1/namespaces`, {
++    const { data: namespacesData } = await userKubeApi.get<TBuiltinResources>(`/apis/core.cozystack.io/v1alpha1/tenantnamespaces`, {
+       headers: {
+         // Authorization: `Bearer ${bearerToken}`,
+         // Cookie: cookies,