[InstCombine] Z / (1.0 / Y) => (Y * Z)

This is a special case of Z / (X / Y) => (Y * Z) / X, with X = 1.0.

The m_OneUse check is avoided because even in the case of the

multiple uses for 1.0/Y, the number of instructions remain the same

and a division is replaced by a multiplication.

Differential Revision: https://reviews.llvm.org/D72319