PagerPluginBase properties to be renamed according to core standards

Problem/Motivation

There are class properties in \Drupal\views\Plugin\views\pager\PagerPluginBasethat violate the Drupal Coding standards. These properties are preceded by a phpcs ignore line, // phpcs:ignore Drupal.NamingConventions.ValidVariableName.LowerCamelName

Steps to reproduce

Proposed resolution

Follow the scope guidelines to make children here as needed to rename and deprecate each property.
The Deprecation policy shows how to deprecate properties.

Remaining tasks

Create child issues

User interface changes

Introduced terminology

API changes

Data model changes

Release notes snippet