[REF] Hide eway extension in UI and only install it if the original e…

[seamuslee001]

…way payment processor is still being used

Overview

This is a follow up too #18349

Before

Eway Core Extension Visible and installable

After

Eway Core Extension hidden and payment processor type record removed if not needed

ping @eileenmcnaughton

[civibot]

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[eileenmcnaughton]

Yep that should do it - so sites not actively using the processor will wind up with it not installed & not visible for install.

[eileenmcnaughton]

@seamuslee001 fail relates