[PT FE] Remove explicit optimum deps from validation (#26948)

**Details:** Optimum-intel will install the required version. Since we
primarily validate compatibility OV with `optimum-intel`, let us leave
only `optimum-intel`

**Ticket:** 154283

Signed-off-by: Kazantsev, Roman <roman.kazantsev@intel.com>

Author: rkazants

tests/requirements_pytorch

@@ -24,7 +24,6 @@ datasets==3.0.1
 easyocr==1.7.2
 facexlib==0.3.0; python_version < "3.12"
 librosa==0.10.2; python_version < "3.12"
-optimum==1.22.0; python_version < "3.12"
 packaging==24.1
 pandas==2.2.3
 protobuf==5.28.2