[Cashtab][Alias] Deprecate Check Alias button

Summary:
As a downstream effect of implementing UAT feedback in T3363 to parse alias status once the user stops typing for 1000ms in the input field, there is no longer a need for the Check Alias button.

This diff deprecates this button, it's function and associated UI components.

All the UI snapshots are 'touched' in this diff because of removing the check button from the Primary Button component, which is imported across these components.

Test Plan:
npm test
grep -r SmartButtonLookupOnly src/ and ensure no results
grep -r lookupAliasDetails src/ and ensure no results
grep -r AliasSearchIcon src/ and ensure no results
grep -r SearchOutlined src/ and ensure no results
grep -r SmartButtonLookupOnly src/ and ensure no results
Navigate to Alias.js and ensure the Check Alias button is no longer in the UI

Reviewers: bytesofman, #bitcoin_abc, Fabien

Reviewed By: #bitcoin_abc, Fabien

Subscribers: Fabien

Differential Revision: https://reviews.bitcoinabc.org/D14898