I've moved all the logic relevant to WBIO into a single file in order to
be able to replace it.
I have tried to upgrade WDIO in order to use the latest version and it
got stuck on my computer.
Furthermore, I was not able to run it locally which made this whole
cycle very long.
After this will be merged I will replace WDIO with cypress.
This doesn't change anything, only moves some code in the tests to a
single file, removes unneeded files and uses the driver pattern, which
will later allow switching the underline WDIO with Cypress.
cc: @nyurik
It required converting mocha tests code into async since [@wdio/sync is
deprecated](https://webdriver.io/docs/sync-vs-async/) starting with
node v16.
It removed the dependency on fibers and on [node-gyp + python](https://
webdriver.io/docs/sync-vs-async/#common-issues-in-sync-mode) indirectly
though which is a great thing.
Also moved away from node-sass to sass since [node-sass is deprecated]
(https://sass-lang.com/blog/libsass-is-deprecated).
