Update tests.yml

Fix integration+experiment codecov statistics

Author: asmyasnikov

.github/workflows/tests.yml

@@ -46,12 +46,13 @@ jobs:
     concurrency:
       group: integration-${{ github.event_name }}-${{ github.ref }}-${{ matrix.os }}-${{ matrix.go-version }}-${{ matrix.ydb-version }}
       cancel-in-progress: true
-    runs-on: ubuntu-latest
+    runs-on: ${{ matrix.os }}-latest
     strategy:
       fail-fast: false
       matrix:
         go-version: [1.21.x, 1.22.x, 1.23.x]
         ydb-version: [23.3, 24.1]
+        os: [ubuntu]
     services:
       ydb:
         image: ydbplatform/local-ydb:${{ matrix.ydb-version }}
@@ -97,7 +98,7 @@ jobs:
     concurrency:
       group: experiment-${{ github.event_name }}-${{ github.ref }}-${{ matrix.os }}-${{ matrix.go-version }}-${{ matrix.ydb-version }}
       cancel-in-progress: true
-    runs-on: ubuntu-latest
+    runs-on: ${{ matrix.os }}-latest
     strategy:
       fail-fast: false
       matrix: