ci: move Linux Go tests to self-hosted runners

.github/workflows/go.yml

@@ -18,13 +18,32 @@ on:
     branches:
       - '**'
 
+concurrency:
+  group: ${{ github.workflow }}-${{ github.ref }}
+  cancel-in-progress: ${{ github.event_name == 'pull_request' }}
+
 jobs:
-  test:
+  test-linux:
+    name: Test (Linux)
+    runs-on: [self-hosted, linux, bee]
+    steps:
+    - name: Checkout
+      uses: actions/checkout@v5
+    - name: Setup Go
+      uses: actions/setup-go@v6
+      with:
+        cache: true
+        go-version-file: go.mod
+    - name: Build
+      run: make build
+    - name: Test with race detector
+      run: make test-ci-race
+  test-other:
     name: Test
     runs-on: ${{ matrix.os }}
     strategy:
       matrix:
-        os: [ubuntu-latest, macos-latest, windows-latest]
+        os: [macos-latest, windows-latest]
     steps:
     - name: Checkout
       uses: actions/checkout@v5
@@ -33,19 +52,14 @@ jobs:
       with:
         cache: true
         go-version-file: go.mod
-    - name: Increase UDP buffer sizes (Ubuntu)
-      if: matrix.os == 'ubuntu-latest'
-      run: |
-        sudo sysctl -w net.core.rmem_max=7500000
-        sudo sysctl -w net.core.wmem_max=7500000
     - name: Increase UDP buffer sizes (macOS)
       if: matrix.os == 'macos-latest'
       run: |
         sudo sysctl -w kern.ipc.maxsockbuf=6291456
     - name: Build
       run: make build
-    - name: Test with race detector (Ubuntu and MacOS)
-      if: matrix.os != 'windows-latest'
+    - name: Test with race detector (macOS)
+      if: matrix.os == 'macos-latest'
       run: make test-ci-race
     - name: Test without race detector (Windows)
       if: matrix.os == 'windows-latest'
@@ -107,7 +121,7 @@ jobs:
   trigger-beekeeper:
     name: Trigger Beekeeper
     runs-on: ubuntu-latest
-    needs: [test, lint, coverage]
+    needs: [test-linux, test-other, lint, coverage]
     if: github.ref == 'refs/heads/master'
     steps:
     - name: Checkout