feat: Remove high-contrast header in wizard

[fralongo]

Description

• depends on https://github.com/cloudscape-design/components/pull/2138
• will not be merged to mainline. Several PRs will be merged at the same time in the future

How has this been tested?

Locally

Review checklist

The following items are to be evaluated by the author(s) and the reviewer(s).

Correctness

• Changes include appropriate documentation updates.
• Changes are backward-compatible if not indicated, see CONTRIBUTING.md.
• Changes do not include unsupported browser features, see CONTRIBUTING.md.
• Changes were manually tested for accessibility, see accessibility guidelines.

Security

• If the code handles URLs: all URLs are validated through the checkSafeUrl function.

Testing

• Changes are covered with new/existing unit tests?
• Changes are covered with new/existing integration tests?

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[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 95.44%. Comparing base (0968bb6) to head (b8b7b2f).

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #2139      +/-   ##
==========================================
- Coverage   95.44%   95.44%   -0.01%     
==========================================
  Files         707      707              
  Lines       18805    18796       -9     
  Branches     6309     6300       -9     
==========================================
- Hits        17948    17939       -9     
  Misses        849      849              
  Partials        8        8              

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