[3441713] - Removed CivicTheme components from Layout templates.

[richardgaunt]

Issue Link: https://www.drupal.org/project/civictheme/issues/3441713

Checklist before requesting a review

• I have formatted the subject to include ticket number as [CS-123] Verb in past tense with dot at the end.
• I have added a link to the issue tracker
• I have provided information in Changed section about WHY something was done if this was not a normal implementation
• I have performed a self-review of my code
• I have commented my code, particularly in hard-to-understand areas
• I have added tests that prove my fix is effective or that my feature works
• I have run new and existing relevant tests locally with my changes, and they passed
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Changed

1. Inlined component layout template into drupal layout template:

see:
https://github.com/civictheme/uikit/blob/main/components/00-base/layout/content-layout--single-column.twig
https://github.com/civictheme/uikit/blob/main/components/00-base/layout/content-layout--single-column-contained.twig

This isn't a complete solution as it includes a ui kit component within the theme but demonstrates the fix required for the linked issue.