Upgrade to image 0.25 and add feature flags for format selection

[tronical]

We should upgrade to image 0.25 and to replace the implicit public dependency via image format selection (see #7218).

• We should have image-format-XXX features for supported formats.
• We should have image-default-formats as per commit a159562.
• For Node.js and Python we need to make sure that both have all default image formats selected.

Note: Double check that Zune-jpeg fix is available to us.

[ogoffart]

For context, we tried to upgrade before and this was reverted in 305e02e that lists the reasons

[ogoffart]

Naming-wise, should the default option be image-format-defaults or image-format-all
Should we offer an option to disable png and jpeg?
Should image-format-svg be added as well despite it is not handled by the image crate?

[tronical]

My take:

Naming-wise, should the default option be image-format-defaults or image-format-all

I'd go with image-default-formats. "default" over "all" as perhaps in the future image may add non-default formats, such as experimental ones.

Should we offer an option to disable png and jpeg?

Yes, true, we should offer to disable png/jpeg. I guess that can only be done if we make image-default-formats the default, so that one can opt out?

Should image-format-svg be added as well despite it is not handled by the image crate?

I'd say no.

What's your opinion?