Add AmplitudeRescale transform

[guarin]

See #1646 for information

[Aanchallllll]

Hello, I would like to work on the following transforms,
RandomFrequencyMask transform
PhaseShift transform
AmplitudeRescale transform
can i be assigned?

[guarin]

Hi yes of course, I'll already assign this one to you. I'll assign the other ones once the PR is ready.

[guarin]

Hi @Aanchallllll did you already have time to look into this?

[payo101]

Hi @guarin could I try to work on this issue also?

[Prasadayus]

Hi @guarin can I work on this?

[guarin]

@payo101 I assigned the issue to you. @Prasadayus thanks for your interest, we only a assign a single person to an issue at once. Please have a look at our other open issues: good first issue

[payo101]

@guarin Quick questions:

• There are two hyperparameters for this transform m and n between which the value p gets decided. Now in the paper the values of m and n are given. So should we allow p as input, or m and n as inputs?
• The input that we expect, is it FFT of the image or RFFT of the image?

[payo101]

@guarin Also raised a PR for the issue: #1694
Please review and suggest changes, if any.

[guarin]

Completed in #1694