Remove all alt name variants when dropping names

[nvkelso]

In some cases when when we ask in queries.yaml to drop_properties and include the all_name_variants config, we still see alt_name variants.

The transform we use is:

vector-datasource/vectordatasource/transform.py

Lines 161 to 180 in f7994f6

	def _is_name(key):
	"""
	Return True if this key looks like a name.
	This isn't as simple as testing if key == 'name', as there are alternative
	name-like tags such as 'official_name', translated names such as 'name:en',
	and left/right names for boundaries. This function aims to match all of
	those variants.
	"""
	# simplest and most common case first
	if key == 'name':
	return True
	# translations next
	if key.startswith('name:'):
	return True
	# then any of the alternative forms of name
	return any(key.startswith(p) for p in tag_name_alternates)

    # then any of the alternative forms of name
    return any(key.startswith(p) for p in tag_name_alternates)

Which uses a list of alternate name tags:

vector-datasource/vectordatasource/transform.py

Lines 497 to 508 in f7994f6

	tag_name_alternates = (
	'int_name',
	'loc_name',
	'nat_name',
	'official_name',
	'old_name',
	'reg_name',
	'short_name',
	'name_left',
	'name_right',
	'name:short',
	)

So the action to take is to expand the list to include alt_name.

[nvkelso]

Build a test using https://www.openstreetmap.org/relation/3987743.