Replace the word "master" with "default" in Views

Problem/Motivation

When creating a new view without a page or block selected, the initial display title is 'Master'.

Following the lead of #2275877: Replace "master/slave" terminology with "primary/replica", this should be changed.
Views already refers to the master display as the default display in some places, so the replacement wording is provided.

Steps to reproduce

Create a new view without creating a block or page and save, the initial display title is 'Master'.

Proposed resolution

1. Update the initial view display name title to 'Default'
2. Change the Views setting wording for /admin/structure/views/settings

Renaming existing displays is out of scope.

Remaining tasks

1. Replace the word "master" with "default"
2. Write update hook to migrate views.settings's ui.show.master_display to a new ui.show.default_display

User interface changes

UI already uses the phrase "Always show the master (default) display", changing to "Always show the default display" is a string change but not disruptive to end users

API changes

N/A

Data model changes

Minor schema change to simple config, no changes to Views config entity schema

Release notes snippet

Views renamed the default display from "Master" to "Default". This does not affect existing Views, only ones created after this change. Additionally the setting to hide/show the default display had its machine name changed from ui.show.master_display to ui.show.default_display. Review the change record for more information.