chore: Switch test workflows to ubicloud runners

Author: erezrokah

.github/workflows/lint_golang.yml

@@ -10,7 +10,7 @@ on:
 jobs:
   golangci:
     name: Lint with GolangCI
-    runs-on: large-ubuntu-plugin-sdk
+    runs-on: ubicloud-standard-8
     timeout-minutes: 10
     steps:
       - uses: actions/checkout@v4

.github/workflows/unittest.yml

@@ -11,7 +11,7 @@ jobs:
   unitests:
     strategy:
       matrix:
-        os: [large-ubuntu-plugin-sdk, large-windows-plugin-sdk, macos-latest]
+        os: [ubicloud-standard-8, large-windows-plugin-sdk, macos-latest]
     runs-on: ${{ matrix.os }}
     timeout-minutes: 15
     steps: