Add flutter startup benchmark for Linux, Windows and MacOs.

Via guide on https://github.com/flutter/flutter/pull/111461#issuecomment-1247113905

This reverts commit 3437fd9c.

Add a basic integration test for the Windows's app startup. In a subsequent change (https://github.com/flutter/flutter/pull/109816), this test will be updated to verify the app's window isn't visible until after the first frame has been drawn.

Part of https://github.com/flutter/flutter/issues/41980

* Add Windows startup test

* Add new tests for Windows desktop

* Bring up complex layout tests for Win Desktop

* Bring up flutter_view startup test for Windows

* Add Platform View startup test for Windows

* Fix typo in .ci.yaml

* Make basename variable final

* Link to bug in .ci.yaml

This reverts commit ff9fe356.

* Add Windows compilation test (hello_world_windows__compile)

* Add devicelab target to .ci.yaml

* Bringup on new target

* Add license to generated files

* Indicate test ownership

* Delete asset from repo

* Add Windows compilation test (hello_world_windows__compile)

* Add devicelab target to .ci.yaml

* Bringup on new target

* Add license to generated files

* Indicate test ownership

* Delete icon

* Use path.basename

Re triggering tests

* Update test owner to desktop team

* Add build-after-edit benchmark

* Clean up analyzer warnings

* Restore line break