[RFC]: Add strided and assign support for `complex/float32/base/mul`

[ShabiShett07]

Description

This RFC proposes adding strided and assign support for /complex/float32/base/mul which will help in implementing plenty of BLAS routines.

Related Issues

Related issues #2039

Questions

No.

Other

No.

Checklist

• I have read and understood the Code of Conduct.
• Searched for existing issues and pull requests.
• The issue name begins with RFC:.

[ShabiShett07]

@kgryte, as per the previous office hours discussion, this issue will be the helper function for cdotu and other BLAS routines related to Complex64. So please review this issue.