Create a hook update to set the items per page to 50 by default on sites that is updating to the new version and config/install with the settings to new installs

Problem/Motivation

Now there is a settings with items per page : 50 in the pagination of block list. In order to have consistence we need to export the settings to config/install folder for the new install and for users that is using today is necessary to create a hook update with this settings by default there

Steps to reproduce

Proposed resolution

Update the file settings.yaml to config/install folder and create the hook_update_N to install this new settings with 50 by default

Remaining tasks

User interface changes

API changes

Data model changes