Purchase a Creative Cloud Photography plan (includes Lightroom). Use a tool like "Adobe CC Portable Maker" (a legitimate script) to create your own portable version from your legally licensed installation files. This gives you portability without piracy.
No solution is perfect. Be aware of these issues before relying on v21.10.106 portable: portable adobe photoshop new version 2020 v2110106
: New "Sampling Area Options" (Auto, Rectangular, Custom) give you more control over which pixels the AI uses to fill gaps. portable adobe photoshop new version 2020 v2110106