Always prefer flash-text as display block

What does this MR do?

Fixes a styling issue of notice flash messages in fluid layout

What are the relevant issue numbers?

Fixes #53920 (closed)

Screeenshots

Notice Flash in Fluid layout

The part I fixed the bug

Before	After

Error Flash in Fluid layout

This was was working before and still works as expected

Fixed layout error and notice Flashes

This two was working before and they still works as expected

Does this MR meet the acceptance criteria?

• Changelog entry added, if necessary
• Documentation created/updated
• Tests added for this feature/bug
• Conforms to the code review guidelines
• Conforms to the merge request performance guidelines
• Conforms to the style guides
• Conforms to the database guides
• Link to e2e tests MR added if this MR has Requires e2e tests label. See the Test Planning Process.