Merged PRs

dolt

7963: Create pg_catalog by default for Doltgres
This makes it such that pg_catalog is created by default when Doltgres is using Dolt. In addition, adds a new function to hook into schema functionality.

354: support VALUES statement
This PR add syntax support for VALUES statment as an alias for SELECT * FROM ....
We are still missing SELECT (VALUES ...) (support for values as a select_expression).
syntax for #8012
353: allow backticks in system and user variables
This PR allows the use of backticks in system and user variables.
We are more lenient than MySQL when it comes to backticks in set statements.
For example, we allow set @abc.def = 10, while MySQL throws an error.
This is because we treat this as a qualified column identifer and automatically strip the backticks.
test bump dolthub/go-mysql-server#2548
fixes #8010

Read Tests	MySQL	Dolt	Multiple
covering_index_scan	2.07	2.81	1.4
groupby_scan	13.46	17.32	1.3
index_join	1.37	5.37	3.9
index_join_scan	1.27	10.84	8.5
index_scan	34.95	53.85	1.5
oltp_point_select	0.18	0.46	2.6
oltp_read_only	3.49	7.56	2.2
select_random_points	0.34	0.75	2.2
select_random_ranges	0.39	0.9	2.3
table_scan	34.95	54.83	1.6
types_table_scan	75.82	137.35	1.8
reads_mean_multiplier			2.7

Write Tests	MySQL	Dolt	Multiple
oltp_delete_insert	7.98	6.09	0.8
oltp_insert	3.82	3.02	0.8
oltp_read_write	8.58	13.95	1.6
oltp_update_index	3.89	3.07	0.8
oltp_update_non_index	3.89	3.02	0.8
oltp_write_only	5.37	6.32	1.2
types_delete_insert	7.7	6.67	0.9
writes_mean_multiplier			1.0

TPC-C TPS Tests	MySQL	Dolt	Multiple
tpcc-scale-factor-1	99.66	26.16	3.8
tpcc_tps_multiplier			3.8

Overall Mean Multiple	2.50