Allow skipping DBFS Root Delta Table if size exceeds preconfigured threshold

[nfx]

Based on

ucx/src/databricks/labs/ucx/hive_metastore/tables.py

Lines 101 to 105 in db580a9

	def sql_migrate_dbfs(self, target_table_key):
	if not self.is_delta:
	msg = f"{self.key} is not DELTA: {self.table_format}"
	raise ValueError(msg)
	return f"CREATE TABLE IF NOT EXISTS {target_table_key} DEEP CLONE {self.key};"

and

ucx/src/databricks/labs/ucx/hive_metastore/table_migrate.py

Lines 277 to 284 in ec1801c

	def _migrate_dbfs_root_table(self, src_table: Table, rule: Rule, grants: list[Grant] | None = None):
	target_table_key = rule.as_uc_table_key
	table_migrate_sql = src_table.sql_migrate_dbfs(target_table_key)
	logger.debug(f"Migrating managed table {src_table.key} to using SQL query: {table_migrate_sql}")
	self._backend.execute(table_migrate_sql)
	self._backend.execute(src_table.sql_alter_to(rule.as_uc_table_key))
	self._backend.execute(src_table.sql_alter_from(rule.as_uc_table_key, self._ws.get_workspace_id()))
	return self._migrate_acl(src_table, rule, grants)

Tasks remaining:

• Allow skipping DBFS Root Delta Table if size exceeds preconfigured threshold