Storing entity storage as a class property is not recommended [#3620722]

Problem/Motivation

Scanning this module with Upgrade Status results in a number of warnings of the form,

Storing entity storage as a class property is not recommended. Call Drupal\Core\Entity\EntityTypeManagerInterface::getStorage() at the call-site instead.

Steps to reproduce

Scan the module with Upgrade Status in Drupal 11.

Proposed resolution

Call getStorage() instead.

API changes

This could affect third party modules that extend the offending class.

Issue fork paragraphs-3620722

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3620722-storing-entity-storage changes, plain diff MR !283
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