Update use of arguments used in comments

Problem/Motivation

Found in #2874067: Fix Drupal.Commenting.DocCommentLongArraySyntax coding standard

This is just one instance but there could be others. Will need to determine scope

Before

*     '{{ arguments.foo.a }}' => 'value',
   *     '{{ arguments.foo.b }}' => 'value',
   *     '{{ arguments.bar.a }}' => 'value',
   *     '{{ arguments.bar.b.c }}' => 'value',

after

   *     '%foo_a' => 'value'
   *     '%foo_b' => 'value'
   *     '%bar_a' => 'value'
   *     '%bar_b_c' => 'value'

Steps to reproduce

N/A

Proposed resolution

TBD

Remaining tasks

Determine better title
Determine scope

User interface changes

N/A

API changes

N/A

Data model changes

N/A

Release notes snippet

N/A