get_requires_dependencies gives out specifier in extracted_requirement

[TG1999]

Description

Please leave a brief description of the bug or feature request:

get_requires_dependencies gives out specifier in extracted_requirement
https://github.com/nexB/scancode-toolkit/blob/aba31126dcb3ab57f2b885090f7145f69b67351a/src/packagedcode/pypi.py#L1152
It should return requirement instead of that

How To Reproduce

Try to get dependencies from a wheel

System configuration

For bug reports, it really helps us to know:

• What OS are you running on? Linux
• What version of scancode-toolkit was used to generate the scan file? 31.0.0b5
• What installation method was used to install/run scancode? source download