[BUGFIX] Use `URLSearchParams` API in context menu

The context menu component now uses the `URLSearchParams` API to build a
query string for AJAX requests, being a replacement for manual string
composition.

Resolves: #101963
Releases: main, 12.4
Change-Id: Ifa5f46df04dc9a66f80e3d414ac0aeaa7ecb1368
Reviewed-on: https://review.typo3.org/c/Packages/TYPO3.CMS/+/81264


Tested-by: core-ci <typo3@b13.com>
Tested-by: Andreas Fernandez <a.fernandez@scripting-base.de>
Reviewed-by: Andreas Fernandez <a.fernandez@scripting-base.de>