add jdk 26 test (#1094)

* add jdk 26

* try to add dependency on matrix test result

* change matrix job name

* update jdk-test job: run always and fail if jdk-matrix has failures

Agent-Logs-Url: https://github.com/elastic/elastic-otel-java/sessions/bfb4681e-c1df-48aa-bf12-b2d1886dcd50

Co-authored-by: v1v <2871786+v1v@users.noreply.github.com>

---------

Co-authored-by: copilot-swe-agent[bot] <198982749+Copilot@users.noreply.github.com>
Co-authored-by: v1v <2871786+v1v@users.noreply.github.com>

Author: 3 people

.github/workflows/build.yml

@@ -57,7 +57,7 @@ jobs:
           path: |
             ./agentextension/build/libs/elastic-otel-agentextension-*.jar
 
-  test:
+  jdk-matrix:
     runs-on: ubuntu-latest
     needs:
       - build
@@ -80,12 +80,16 @@ jobs:
             vm: 'hotspot'
           - version: 25
             vm: 'hotspot'
+          - version: 26
+            vm: 'hotspot'
           - version: 11
             vm: 'openj9'
           - version: 21
             vm: 'openj9'
           - version: 25
             vm: 'openj9'
+          - version: 26
+            vm: 'openj9'
     steps:
       # We use the cached working directory so that we don't have to recompile everything
       - name: Download cached build working directory
@@ -119,6 +123,18 @@ jobs:
           name: test-results-${{ matrix.version }}-${{ matrix.vm }}
           path: '**/build/test-results/test/TEST-*.xml'
 
+  jdk-test:
+    runs-on: ubuntu-latest
+    if: always()
+    needs:
+      - jdk-matrix
+    steps:
+      - name: Check jdk-matrix result
+        run: |
+          result="${{ needs.jdk-matrix.result }}"
+          echo "jdk-matrix result: $result"
+          [[ "$result" == "success" ]] || exit 1
+
   muzzle-check:
     runs-on: ubuntu-latest
     steps: