Parse XMP tag bytes without decoding to string

[radarhere]

Resolves #8957

The issue has found that XMP tag bytes may contain non-ascii bytes. This raises an error when trying to parse them to get the orientation.

Pillow/src/PIL/Image.py

Lines 1541 to 1544 in 3c71559

	if not xmp_tags and (xmp_tags := self.info.get("xmp")):
	xmp_tags = xmp_tags.decode("utf-8")
	if xmp_tags:
	match = re.search(r'tiff:Orientation(="|>)([0-9])', xmp_tags)

Instead of changing the XMP tag bytes to a string to match the pattern, this PR changes the pattern to bytes to match the XMP tag bytes.