Convert tag cloud tests to jest (elastic#70066) (elastic#70850)

* Convert tag cloud tests to jest

* Add mocks to test_utils and remove tests from legacy

* Revert changes made by accident

* Update tag_cloud_visualization.test.js

* Update tag_cloud.test.js

* Update jsdom_svg_mocks.ts

* Add restoring previous value to window.SVGElement.prototype.transform

* Get rid of some deep imports

* Reimport jsdom_svg_mocks functions from test_utils/public

* Get rid of ExprVis by inlining some of its params to vis object

Co-authored-by: Elastic Machine <elasticmachine@users.noreply.github.com>
Co-authored-by: Alexey Antonov <alexwizp@gmail.com>

Co-authored-by: Elastic Machine <elasticmachine@users.noreply.github.com>
Co-authored-by: Alexey Antonov <alexwizp@gmail.com>

package.json

@@ -450,9 +450,10 @@
     "is-path-inside": "^2.1.0",
     "istanbul-instrumenter-loader": "3.0.1",
     "jest": "^25.5.4",
-    "jest-environment-jsdom-thirteen": "^1.0.1",
+    "jest-canvas-mock": "^2.2.0",
     "jest-circus": "^25.5.4",
     "jest-cli": "^25.5.4",
+    "jest-environment-jsdom-thirteen": "^1.0.1",
     "jest-raw-loader": "^1.0.1",
     "jimp": "^0.9.6",
     "json5": "^1.0.1",