minor #38866 [Console] Test degraded true colors (freezy-sk)
minor #38866 [Console] Test degraded true colors (freezy-sk)

This PR was squashed before being merged into the 5.2-dev branch.

Discussion
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[Console] Test degraded true colors

| Q             | A
| ------------- | ---
| Branch?       | 5.x
| Bug fix?      | no
| New feature?  | no <!-- please update src/**/CHANGELOG.md files -->
| Deprecations? | no <!-- please update UPGRADE-*.md and src/**/CHANGELOG.md files -->
| Tickets       | <!-- prefix each issue number with "Fix #", no need to create an issue if none exist, explain below instead -->
| License       | MIT
| Doc PR        | symfony/symfony-docs#14494 <!-- required for new features -->

Testing hidden feature of hex colors degraded to ANSI named colors for terminals without true color support.

Commits
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a26dc0931b [Console] Test degraded true colors

symfony/Console