Views exposed form is not reflecting the active facets when they have been set using a process plugin

Created a MR implementing a fix using a form alter. I had to enable the static_caching on the facets config entity to ensure the active facet values are still available when loading the facet on a later phase (in our case the form alter). The general activation of static caching of config_entities is being discussed here #1885830: Enable static caching for config entities →

Rerolled against 3.0.x-dev