Trash overwrites existing enabled_entity_types configurations for profile installs

Problem/Motivation

For instances where a distribution already specifies certain specific configuration for the trash settings' node bundles, on a clean install of the distribution/profile, the existing bundle settings are overridden to be an empty array.

One could argue that you shouldn't be targeting specific node bundles in the first place (I don't plan to, I just thought it was worth flagging).

Steps to reproduce

1. Have a Drupal profile that provides the following trash.settings config in its config/install folder:

enabled_entity_types:
  node: [basic_page]

2. When the trash module is installed, it overwrites the existing node entity settings to be an empty array, rather than only for the specific basic_page bundle.

Proposed resolution

Relax the modules_installed hook, so that it respects whatever the existing enabled_entity_types configuration was if it exists.

Remaining tasks

Provide MR/patch.

User interface changes

N/A

API changes

N/A