ci: disable 26.04 temporary (#1010)

The combination with external JSON and dynamic matrix
generation with exclude directive might be pitfall.

For v6.0.3 release, temporary disable it.

Signed-off-by: Kentaro Hayashi <hayashi@clear-code.com>

Author: kenhys

.github/workflows/apt.matrix.json

@@ -23,12 +23,6 @@
       "rake-job": "ubuntu-noble",
       "test-docker-image": "ubuntu:noble",
       "test-incus-image": "images:ubuntu/24.04"
-    },
-    {
-      "label": "Ubuntu Resolute amd64",
-      "rake-job": "ubuntu-resolute",
-      "test-docker-image": "ubuntu:resolute",
-      "test-incus-image": "images:ubuntu/26.04"
     }
   ]
 }

.github/workflows/apt.yml

@@ -327,12 +327,6 @@ jobs:
     strategy:
       fail-fast: false
       matrix: ${{ fromJSON(needs.define-matrix.outputs.matrix) }}
-      # FIXME: 26.04 incus image is not ready yet
-      exclude:
-        - label: "Ubuntu Resolute amd64"
-          rake-job: "ubuntu-resolute"
-          test-docker-image: "ubuntu:resolute"
-          test-incus-image: "images:ubuntu/26.04"
     steps:
       - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
       - uses: actions/download-artifact@3e5f45b2cfb9172054b4087a40e8e0b5a5461e7c # v8.0.1
@@ -358,12 +352,6 @@ jobs:
     strategy:
       fail-fast: false
       matrix: ${{ fromJSON(needs.define-matrix.outputs.matrix) }}
-      # FIXME: 26.04 incus image is not ready yet
-      exclude:
-        - label: "Ubuntu Resolute amd64"
-          rake-job: "ubuntu-resolute"
-          test-docker-image: "ubuntu:resolute"
-          test-incus-image: "images:ubuntu/26.04"
     steps:
       - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
       - uses: actions/download-artifact@3e5f45b2cfb9172054b4087a40e8e0b5a5461e7c # v8.0.1
@@ -392,12 +380,6 @@ jobs:
     strategy:
       fail-fast: false
       matrix: ${{ fromJSON(needs.define-matrix.outputs.matrix) }}
-      # FIXME: 26.04 incus image is not ready yet
-      exclude:
-        - label: "Ubuntu Resolute amd64"
-          rake-job: "ubuntu-resolute"
-          test-docker-image: "ubuntu:resolute"
-          test-incus-image: "images:ubuntu/26.04"
     steps:
       - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
       - uses: actions/download-artifact@3e5f45b2cfb9172054b4087a40e8e0b5a5461e7c # v8.0.1