…t RFC compliant

…t RFC compliant

…t RFC compliant

…t RFC compliant

…t RFC compliant

…t RFC compliant

… (Daniel Kozák)

This PR was squashed before being merged into the 5.4 branch.

Discussion
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[HttpClient] Fix encoding some characters in query strings

| Q             | A
| ------------- | ---
| Branch?       | 5.4 <!-- see below -->
| Bug fix?      | yes
| New feature?  | no <!-- please update src/**/CHANGELOG.md files -->
| Deprecations? | no <!-- please update UPGRADE-*.md and src/**/CHANGELOG.md files -->
| Tickets       | Fix #50670 <!-- prefix each issue number with "Fix #", no need to create an issue if none exists, explain below instead -->
| License       | MIT
| Doc PR        | symfony/symfony-docs#... <!-- required for new features -->
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Commits
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cb26c19 [HttpClient] Fix encoding some characters in query strings