Build: run integration tests against actual build (#80203)

* experiment with running macOS integration test against real build

* echo command

* more tests

* Revert "more tests"

This reverts commit b07bde89be.

* test

* fix script

* fix build

* fix tests

* fix build

* fix build

* conditionally enable test for remote

* adopt for linux and windows

* disable failing test

* fix build

* windows - echo off

* fix variable check

* fix path

* fix compile

* echo off

* mac polish

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

@@ -106,6 +106,9 @@ steps:
 
 - script: |
     set -e
+    APP_ROOT=$(agent.builddirectory)/VSCode-linux-x64
+    APP_NAME=$(node -p "require(\"$APP_ROOT/resources/app/product.json\").applicationName")
+    INTEGRATION_TEST_ELECTRON_PATH="$APP_ROOT/$APP_NAME" \
     DISPLAY=:10 ./scripts/test-integration.sh --build --tfs "Integration Tests"
     # yarn smoketest -- --build "$(agent.builddirectory)/VSCode-linux-x64"
   displayName: Run integration tests