Replace `.gl-text-transform-uppercase` with `.gl-uppercase`

What does this MR do and why?

This MR replaces the custom CSS class .gl-text-transform-uppercase with .gl-uppercase coming from Tailwind.

Screenshots or screen recordings

I added screenshots of replacements as comments in the code changes.

How to set up and validate locally

1. Make sure you have an Ultimate license
2. For ee/app/views/admin/application_settings/_elasticsearch_form.html.haml
   1. Go to http://localhost:3000/admin/application_settings/advanced_search and expand Indexing status
3. For ee/app/assets/javascripts/security_orchestration/components/policy_editor/scan_result/rule/scan_filters/attribute_filters.vue
   1. Go to http://localhost:3000/flightjs/Flight/-/security/policies/new?type=scan_execution_policy and get to a point where you can see the scan result
4. Foree/app/assets/javascripts/security_orchestration/components/policy_editor/section_layout.vue
   1. Go to http://localhost:3000/flightjs/Flight/-/security/policies/new?type=scan_execution_policy => Rules box

Related to #456622