Fix Styleguide missing plugin ID. Which does not work in 9.x anymore

Problem/Motivation

If a Subtheme is created and you like to use styleguide as intended this is not possible right now, because of a missing plugin.

AH01071: Got error 'PHP message: Uncaught PHP Exception Drupal\\Component\\Plugin\\Exception\\PluginNotFoundException: "The "blb_col_1" plugin does not exist. Valid plugin IDs for Drupal\\Core\\Layout\\LayoutPluginManager are: bs_1col, bs_1col_stacked, bs_2col, bs_2col_bricked, bs_2col_stacked, bs_3col, bs_3col_bricked, bs_3col_stacked, bs_4col, bs_4col_bricked, bs_4col_stacked, layout_twocol_section, layout_threecol_section, layout_fourcol_section, layout_onecol, layout_twocol, layout_twocol_bricks, layout_threecol_25_50_25, layout_threecol_33_34_33, ds_1col, ds_1col_wrapper, ds_2col, ds_2col_fluid, ds_2col_stacked, ds_2col_stacked_fluid, ds_3col, ds_3col_equal_width, ds_3col_stacked, ds_3col_stacked_fluid, ds_3col_stacked_equal_width, ds_4col, ds_reset, vertical_media_teaser_xlarge, vertical_media_teaser_large, vertical_media_teaser_medium, vertical_media_teaser_small, vertical_media_teaser_xsmall, horizontal_media_teaser_xlarge, horizontal_media_teaser_large, horizontal_media_teaser_medium, horizontal_media_teaser_small,...', referer: http://h2941247.stratoserver.net/admin/appearance

Steps to reproduce

Install Varbase as usual
Enable styleguide
Create a varbase-bs4 subtheme by using the script
Set the subtheme as default
Click the styleguide tab and select the theme

The error above will be the result

Proposed resolution

Fix missing plugin to make styleguide greeate, again

Add the patch for #3184083: Fix invalid id passed to layout plugin
Pass the layout not definition id. which will add the extension name if the layout was a dynamic layout.

Remaining tasks

• Fix issue
• Patch
• Test
• Review
• Release

User interface changes

• None

API changes

• None

Data model changes

• None

https://www.drupal.org/files/issues/2021-07-25/AwesomeScreenshot-product...