🌱 chore: upgrade to go 1.26 (#1571)

* chore: upgrade to go 1.26

Upgrades Go version from 1.25 to 1.26.

Changes:
- go.mod — go directive updated to 1.26.0
- .github/workflows/*.yml — GO_VERSION updated to 1.26 (5 workflows)
- build/Dockerfile.* — base image updated to golang:1.26-bookworm (5 Dockerfiles)
- pkg/placement/controllers/scheduling/scheduling_controller.go — fix
  pre-existing printf format mismatch (%q -> %d for int args) surfaced
  by stricter Go 1.26 linter

Relates to: https://github.com/open-cluster-management-io/ocm/issues/1555

Signed-off-by: Tesshu Flower <tflower@redhat.com>

* fix: pin engineerd/setup-kind to working commit SHA

Pin engineerd/setup-kind to commit SHA ecfad61750951586a9ef973db567df1d28671bdc
which is the tip of the v0.6.2 branch and includes the required dist/
build artifact. The v0.6.2 tag currently resolves to a different commit
that is missing dist/main/index.js, causing e2e CI to fail.

Signed-off-by: Tesshu Flower <tflower@redhat.com>

---------

Signed-off-by: Tesshu Flower <tflower@redhat.com>

.github/workflows/cloudevents-integration.yml

@@ -14,7 +14,7 @@ on:
       - release-*
 
 env:
-  GO_VERSION: '1.25'
+  GO_VERSION: '1.26'
   GO_REQUIRED_MIN_VERSION: ''
 
 permissions:

.github/workflows/e2e.yml

@@ -15,7 +15,7 @@ on:
       - release-*
 
 env:
-  GO_VERSION: '1.25'
+  GO_VERSION: '1.26'
   GO_REQUIRED_MIN_VERSION: ''
   USE_EXISTING_CLUSTER: false # set to true to use an existing kind cluster for debugging with act
 
@@ -36,7 +36,7 @@ jobs:
         with:
           go-version: ${{ env.GO_VERSION }}
       - name: Setup kind
-        uses: engineerd/setup-kind@v0.6.2
+        uses: engineerd/setup-kind@ecfad61750951586a9ef973db567df1d28671bdc # v0.6.2
         with:
           version: v0.22.0
           skipClusterCreation: ${{ env.USE_EXISTING_CLUSTER }}
@@ -63,7 +63,7 @@ jobs:
         with:
           go-version: ${{ env.GO_VERSION }}
       - name: Setup kind
-        uses: engineerd/setup-kind@v0.6.2
+        uses: engineerd/setup-kind@ecfad61750951586a9ef973db567df1d28671bdc # v0.6.2
         with:
           version: v0.22.0
           skipClusterCreation: ${{ env.USE_EXISTING_CLUSTER }}
@@ -90,7 +90,7 @@ jobs:
         with:
           go-version: ${{ env.GO_VERSION }}
       - name: Setup kind
-        uses: engineerd/setup-kind@v0.6.2
+        uses: engineerd/setup-kind@ecfad61750951586a9ef973db567df1d28671bdc # v0.6.2
         with:
           version: v0.22.0
           skipClusterCreation: ${{ env.USE_EXISTING_CLUSTER }}
@@ -117,7 +117,7 @@ jobs:
         with:
           go-version: ${{ env.GO_VERSION }}
       - name: Setup kind
-        uses: engineerd/setup-kind@v0.6.2
+        uses: engineerd/setup-kind@ecfad61750951586a9ef973db567df1d28671bdc # v0.6.2
         with:
           version: v0.22.0
           skipClusterCreation: ${{ env.USE_EXISTING_CLUSTER }}

.github/workflows/post.yml

@@ -13,7 +13,7 @@ on:
 
 env:
   # Common versions
-  GO_VERSION: '1.25'
+  GO_VERSION: '1.26'
   GO_REQUIRED_MIN_VERSION: ''
 
 permissions:

.github/workflows/pre.yml

@@ -13,7 +13,7 @@ on:
       - release-*
 
 env:
-  GO_VERSION: '1.25'
+  GO_VERSION: '1.26'
   GO_REQUIRED_MIN_VERSION: ''
 
 permissions:

.github/workflows/releaseimage.yml

@@ -6,7 +6,7 @@ on:
       - 'v*.*.*'
 env:
   # Common versions
-  GO_VERSION: '1.25'
+  GO_VERSION: '1.26'
   GO_REQUIRED_MIN_VERSION: ''
   GOPATH: '/home/runner/work/ocm/ocm/go'
   GITHUB_REF: ${{ github.ref }}