dolthub/dolt#9641 - Add BIT type conversion support [no-release-notes]

[elianddb]

Add BIT type conversion support to doltgres query converter to enable compatibility with go-mysql-server UNION regression tests.
Companion dolthub/go-mysql-server#3148

[github-actions]

	Main	PR
covering_index_scan_postgres	348.55/s	332.70/s	-4.6%
index_join_postgres	154.95/s	156.83/s	+1.2%
index_join_scan_postgres	187.47/s	189.90/s	+1.2%
index_scan_postgres	12.48/s	12.57/s	+0.7%
oltp_point_select	2469.72/s	2468.48/s	-0.1%
oltp_read_only	1801.11/s	1806.15/s	+0.2%
select_random_points	116.89/s	117.87/s	+0.8%
select_random_ranges	126.68/s	127.23/s	+0.4%
table_scan_postgres	11.86/s	11.66/s	-1.7%
types_table_scan_postgres	5.48/s	5.46/s	-0.4%

[github-actions]

	Main	PR
Total	42090	42090
Successful	16724	16724
Failures	25366	25366
Partial Successes1	5545	5545

	Main	PR
Successful	39.7339%	39.7339%
Failures	60.2661%	60.2661%

Footnotes

1. These are tests that we're marking as Successful, however they do not match the expected output in some way. This is due to small differences, such as different wording on the error messages, or the column names being incorrect while the data itself is correct. ↩

[jennifersp]

I think the PR title is misleading since it does not add BIT type support for doltgres. Maybe you can specify that it's mysql BIT type conversion support for enginetests. Also, maybe you can add [no-release-notes] tag in front of it. 🙂