Update test names from "Electron" to "Core " (#20917)

* Update test naming convention from Electron to Core to avoid confusions

* Added comments

* Fix comment placement

* Remove CARBON EDIT from sql-* files

build/azure-pipelines/linux/sql-product-build-linux.yml

@@ -120,7 +120,7 @@ steps:
   - script: |
       set -e
       DISPLAY=:10 ./scripts/test.sh --build --tfs "Unit Tests" --coverage
-    displayName: Run unit tests (Electron)
+    displayName: Run core unit tests
     condition: and(succeeded(), eq(variables['RUN_TESTS'], 'true'), ne(variables['EXTENSIONS_ONLY'], 'true'))
 
   - script: |
@@ -133,7 +133,7 @@ steps:
       INTEGRATION_TEST_ELECTRON_PATH="$APP_ROOT/$APP_NAME" \
       VSCODE_REMOTE_SERVER_PATH="$(agent.builddirectory)/azuredatastudio-reh-linux-x64" \
       DISPLAY=:10 ./scripts/test-integration.sh --build --tfs "Integration Tests"
-    displayName: Run integration tests (Electron)
+    displayName: Run core integration tests
     condition: and(succeeded(), eq(variables['RUN_TESTS'], 'true'), ne(variables['EXTENSIONS_ONLY'], 'true'))
 
   - script: |