test: Adding Percy Snapshot on VTK, PDF and Microscopy tests (#1059)

* Adding Percy Snapshot on VTK, PDF and Microscopy tests

* Small improvement to always click on first search result

* Wait for search result

* Added timouts all over the code to avoid intermitted failures in CI

* Increasing Default Timeout and other configs

* Cleaning up the code

* try force enabling gpu

* Try custom executor with newer version of chrome

* Fix based on review comments

* Increased minimum thumbnails expected on VTK test

* Fix config validation

* Make sure we're using the chrome browser

platform/viewer/cypress.json

@@ -2,5 +2,9 @@
   "baseUrl": "http://localhost:3000",
   "video": false,
   "chromeWebSecurity": false,
+  "waitForAnimations": true,
+  "defaultCommandTimeout": 10000,
+  "requestTimeout": 10000,
+  "responseTimeout": 10000,
   "projectId": "4oe38f"
 }