docs: use Google __init__/Args style for SimCLR transforms (#1948)

Move constructor parameter docs from the class-level Attributes section
into an Args section in each __init__ docstring, in compact same-line
Google style. Add :special-members: __init__ to the simclr_transform
autodoc entry so the parameters render.

Co-authored-by: Saud Kamran <saud.kamran92@gmail.com>