Reintroduce support for `supports_fetch_first_n_rows_and_offset?` functionality

[yahonda]

Steps to reproduce

oracle-enhanced/lib/active_record/connection_adapters/oracle_enhanced_adapter.rb

Lines 313 to 320 in bb97edc

	def supports_fetch_first_n_rows_and_offset?
	false
	# TODO: At this point the connection is not initialized yet,
	# so `database_version` raises an error
	#
	# !use_old_oracle_visitor && database_version.first >= 12
	end

Expected behavior

supports_fetch_first_n_rows_and_offset? should consider use_old_oracle_visitor and database_version

Actual behavior

It always returns false

System configuration

Rails version: 7.1.4

Oracle enhanced adapter version: master branch

Ruby version: ruby 3.3.5 (2024-09-03 revision ef084cc8f4) [x86_64-linux]

Oracle Database version: Oracle Database 23ai Free Release 23.0.0.0.0 - Develop, Learn, and Run for Free