feat: #3616857 Release Varbase 9.2.1

Version-bump release MR for Varbase 9.2.1.

Pins the profile's component requirements to the released 9.2.x line (varbase_core, varbase_api, varbase_media, varbase_editor, varbase_landing, varbase_bootstrap_paragraphs, varbase_heroslider_media, varbase_carousels, varbase_blog, varbase_search, varbase_seo, varbase_auth, varbase_total_control, varbase_styleguide, varbase_email, vartheme_bs4, vartheme_claro, varbase_layout_builder, varbase_workflow) and vardot/varbase-patches, and bumps varbase.info.yml version to 9.2.1.

Issue: https://www.drupal.org/project/varbase/issues/3616857

AI-Generated: Yes

Checkpoints

• File an issue
• Addition/Change/Update/Fix
• Testing to ensure no regression
• Automated unit testing coverage
• Automated functional testing coverage
• UX/UI designer responsibilities
• Readability
• Accessibility
• Performance
• Security
• Developer Documentation
• User Guide Documentation
• Reviewed by a human
• Code review by maintainers
• Full testing and approval
• Credit contributors
• Review with the product owner