Add LogFormat() method from servercfg.ServerConfig to DoltgresConfig

[fulghum]

PR dolthub/dolt#8890 added a new LogFormat() method to the ServerConfig interface.

[github-actions]

	Main	PR
covering_index_scan_postgres	359.59/s	${\color{red}DNF}$
index_join_postgres	152.45/s	${\color{red}DNF}$
index_join_scan_postgres	182.73/s	${\color{red}DNF}$
index_scan_postgres	12.04/s	${\color{red}DNF}$
oltp_point_select	2729.23/s	${\color{red}DNF}$
oltp_read_only	1842.80/s	${\color{red}DNF}$
select_random_points	111.28/s	${\color{red}DNF}$
select_random_ranges	125.03/s	${\color{red}DNF}$
table_scan_postgres	9.95/s	${\color{red}DNF}$
types_table_scan_postgres	5.22/s	${\color{red}DNF}$

[reltuk]

Handled in the bump PR #1249