Change filter spaceless to apply spaceless and endapply. As spaceless was deprecated since Twig 2.7

Problem/Motivation

• The spaceless tag is deprecated since Twig 2.7, use the "spaceless" filter with the "apply" tag instead.
• #3094493: Upgrade to Twig 3
• #3091378: Investigate \Drupal\Core\Template\TwigEnvironment::getTemplateClass(): check if it still provides value, and if so, contribute it upstream

Proposed resolution

• Use the apply tag from Twig, and pass the spaceless filter.
• Change {% spaceless %} to {% apply spaceless %}
• Change {% endspaceless %} to {% endapply %}

Remaining tasks

• ✅ File an issue about this project
• ✅ Addition/Change/Update/Fix to this project
• ✅ Testing to ensure no regression
• ➖ Automated unit/functional testing coverage
• ➖ Developer Documentation support on feature change/addition
• ➖ User Guide Documentation support on feature change/addition
• ➖ Accessibility and Readability
• ✅ Code review from 1 Varbase core team member
• ✅ Full testing and approval
• ✅ Credit contributors
• ✅ Review with the product owner
• ✅ Update Release Notes and Update Helper on new feature change/addition
• ✅ Release varbase-9.0.12, varbase_bootstrap_paragraphs-9.0.11

Varbase update type

• ✅ No Update
• ➖ Optional Update
• ➖ Forced Update
• ➖ Forced Update if Unchanged

User interface changes

• N/A

API changes

• N/A

Data model changes

• N/A

Release notes snippet

• Issue #3343681: Changed filter spaceless to apply spaceless and endapply. As spaceless was deprecated since Twig 2.7