[pyiceberg_core] Expose IcebergTableProvider to python

[kevinjqliu]

Inspired by #650

I want to expose IcebergTableProvider to Datafusion as python binding using Custom Table Provider

Integration with Python might look something like,

from pyiceberg_core import table_provider
from datafusion import SessionContext

ctx = SessionContext()
iceberg_table_provider = table_provider.create_table_provider(
    metadata_location=metadata_location
)
ctx.register_table_provider("test", iceberg_table_provider)
table = ctx.table("test")
table.show()

[kevinjqliu]

Possibly blocked by apache/datafusion#13851