Apply encoder options when saving multiple PNG frames

[radarhere]

Resolves #9299

Pillow/src/PIL/PngImagePlugin.py

Lines 1360 to 1366 in 3b8fd04

	# encoder options
	im.encoderconfig = (
	im.encoderinfo.get("optimize", False),
	im.encoderinfo.get("compress_level", -1),
	im.encoderinfo.get("compress_type", -1),
	im.encoderinfo.get("dictionary", b""),
	)

only applies the encoderinfo options to single frames, not multiple frames, especially after each of the multiple frames are copied.

This PR applies the encoderinfo options to all frames when saving PNGs.