SaveImage set_options to return self

[wyli]

Describe the bug
follow up of #6136, SaveImage.set_options is not easy to use in a compose transform:

saver = SaveImaged(keys="pred")
saver.set_options(init_kwargs={"affine_lps_to_ras": True})
postprocessing = Compose(
    [
        EnsureTyped(keys=["pred", "seg"]),  # ensure Tensor type after `decollate`
        Activationsd(keys="pred", sigmoid=True),
        ...
        AsDiscreted(keys="pred", threshold=0.5),
        saver,
    ]
)

this is a feature request to support:

postprocessing = Compose(
    [
        EnsureTyped(keys=["pred", "seg"]),  # ensure Tensor type after `decollate`
        Activationsd(keys="pred", sigmoid=True),
        ...
        AsDiscreted(keys="pred", threshold=0.5),
        SaveImaged(keys="pred").set_options(init_kwargs={"affine_lps_to_ras": True}),
    ]
)

which is easily achievable if SaveImage.set_options can return self