PHP 8.3 compatibility updates

Problem/Motivation

In preparation for migrating to PHP 8.3 I ran a PHPCompatibility test for the 8.3 version. These were the results:

FILE: /var/www/html/docroot/modules/contrib/access_policy/src/Entity/AccessPolicy.php
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FOUND 3 ERRORS AFFECTING 3 LINES
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 211 | ERROR | Indirect access to variables, properties and methods will be evaluated strictly in left-to-right order
     |       | since PHP 7.0. Use curly braces to remove ambiguity.
 219 | ERROR | Indirect access to variables, properties and methods will be evaluated strictly in left-to-right order
     |       | since PHP 7.0. Use curly braces to remove ambiguity.
 249 | ERROR | Indirect access to variables, properties and methods will be evaluated strictly in left-to-right order
     |       | since PHP 7.0. Use curly braces to remove ambiguity.
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FILE: /var/www/html/docroot/modules/contrib/access_policy/src/Plugin/access_policy/SelectionRule/Numeric.php
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FOUND 0 ERRORS AND 1 WARNING AFFECTING 1 LINE
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 12 | WARNING | 'numeric' is a soft reserved keyword as of PHP version 7.0 and should not be used to name a class,
    |         | interface or trait or as part of a namespace (T_CLASS)
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Steps to reproduce

Run phpcs -d memory_limit=1G --standard=PHPCompatibility --runtime-set testVersion 8.3 -q --extensions=php,inc,module,theme ./docroot/modules/contrib on the codebase.

Proposed resolution

Fix all code that will throw errors or warnings when using PHP 8.3 to run your Drupal instance.