Fix k8s master tests (#1600)

As part of #1582 I modified some scripts to use `$HOME/.kube` instead of
`~/.kube` to appease the linter. I accidentally made this change to a
download-artifacts step, which doesn't support $HOME.

Meanwhile PRs have been passing because we only exercise this test
cluster logic on master.

Author: blampe

provider-ci/internal/pkg/templates/native/.github/workflows/build.yml

@@ -540,7 +540,7 @@ jobs:
       uses: actions/download-artifact@d3f86a106a0bac45b974a628896c90dbdf5c8093 # v4.3.0
       with:
         name: config
-        path: $HOME/.kube/
+        path: ~/.kube/
     #{{- end }}#
     #{{- if .Config.AWS }}#
     - name: Generate Pulumi Access Token
@@ -884,6 +884,7 @@ jobs:
       with:
         name: config
         path: ~/.kube/config
+        if-no-files-found: error
     #{{- end }}#
   destroy-test-cluster:
     runs-on: ubuntu-latest

provider-ci/internal/pkg/templates/native/.github/workflows/prerelease.yml

@@ -915,6 +915,7 @@ jobs:
       with:
         name: config
         path: ~/.kube/config
+        if-no-files-found: error
     #{{- end }}#
   destroy-test-cluster:
     runs-on: ubuntu-latest

provider-ci/internal/pkg/templates/native/.github/workflows/release.yml

@@ -931,6 +931,7 @@ jobs:
       with:
         name: config
         path: ~/.kube/config
+        if-no-files-found: error
     #{{- end }}#
   destroy-test-cluster:
     runs-on: ubuntu-latest

provider-ci/test-providers/kubernetes/.github/workflows/build.yml

@@ -471,7 +471,7 @@ jobs:
       uses: actions/download-artifact@d3f86a106a0bac45b974a628896c90dbdf5c8093 # v4.3.0
       with:
         name: config
-        path: $HOME/.kube/
+        path: ~/.kube/
     - name: Generate Pulumi Access Token
       id: generate_pulumi_token
       uses: pulumi/auth-actions@1c89817aab0c66407723cdef72b05266e7376640 # v1.0.1
@@ -757,6 +757,7 @@ jobs:
       with:
         name: config
         path: ~/.kube/config
+        if-no-files-found: error
   destroy-test-cluster:
     runs-on: ubuntu-latest
     name: teardown-test-cluster

provider-ci/test-providers/kubernetes/.github/workflows/prerelease.yml

@@ -790,6 +790,7 @@ jobs:
       with:
         name: config
         path: ~/.kube/config
+        if-no-files-found: error
   destroy-test-cluster:
     runs-on: ubuntu-latest
     name: teardown-test-cluster

provider-ci/test-providers/kubernetes/.github/workflows/release.yml

@@ -804,6 +804,7 @@ jobs:
       with:
         name: config
         path: ~/.kube/config
+        if-no-files-found: error
   destroy-test-cluster:
     runs-on: ubuntu-latest
     name: teardown-test-cluster