fix:update config during table refresh

[yingjianwu98]

Rationale for this change

Table.refresh() was not updating self.config from the refreshed TableResponse. The config field contains out of date, server-generated properties such as per-table access tokens (token) and credential refresh endpoints(client.refresh-credentials-endpoint).

Are these changes tested?

Yes, with a new test.

Are there any user-facing changes?

No

[gabeiglio]

This is a good catch, we didn't see any issues before with access tokens as the fresh.config was being correctly propagated to the table's fileio

[kevinjqliu]

LGTM!

nice catch! now this matches the Table object's fields

iceberg-python/pyiceberg/table/__init__.py

Lines 1043 to 1053 in 6e68c9c

	class Table:
	"""An Iceberg table."""
	_identifier: Identifier = Field()
	metadata: TableMetadata
	metadata_location: str = Field()
	io: FileIO
	catalog: Catalog
	config: dict[str, str]
	def __init__(