Remove UI related settings from CLI (#8783)

* Remove all ui reference in dapps interface

* Pass primary cli build

* Add back parity wallet dapp as builtin

* Clean up ui settings

* Fix all tests in cli

* Missed ui files to commit

* Add parity-utils endpoint back

* Fix non-dapp feature compiling

* Inline styles

* Remove parity-utils endpoint

* Remove ui precompiled crate

* Remove parity-ui alltogether

* Remove ui feature flags

* Move errors to static methods

* Fix tests

* Remove all reference to utils endpoint and remove server side injection

According to https://github.com/paritytech/parity/pull/8539, inject.js is already handled by Parity UI.