Feature Split Video: Update twig to honor paragraph view display and use field renderers #1219

Similar to #1099, Update the "Feature Split Video" paragraph twig template to:

• Move display logic to the .theme file
• Use field render twig templates instead of hard-coding in the paragraph
• Have the view display settings for the paragraph apply (except for having the image field show first)
• Match the view display field order as the feature split paragraph

Additionally, the "Background" dropdown option should be updated to use "Theme" instead.

See the PR at https://github.com/web-illinois/illinois_framework_theme/pull/1100/changes to view the changes done to fix the "Feature Split" paragraph