Refactor generation of grammar files.

[mxwli]

Uses md5sum to generate hash of cypher.g4 and keywords.txt
Hash replaces file comparison.
Closes #3683

[ray6080]

Thanks!

[github-actions]

Benchmark Result

Master commit hash: 95d338e22f58405ebc255286f8f6594c01e9f0b0
Branch commit hash: 6d46d4e9e9ead0b4f928f2cdb908dfcf2cf96644

Query Group	Query Name	Mean Time - Commit (ms)	Mean Time - Master (ms)	Diff
aggregation	q24	677.72	675.04	2.68 (0.40%)
aggregation	q28	11728.56	11363.26	365.30 (3.21%)
filter	q14	153.27	150.84	2.43 (1.61%)
filter	q15	149.07	152.91	-3.84 (-2.51%)
filter	q16	329.61	328.89	0.72 (0.22%)
filter	q17	475.34	471.30	4.04 (0.86%)
filter	q18	1967.46	1941.45	26.01 (1.34%)
fixed_size_expr_evaluator	q07	566.34	577.38	-11.04 (-1.91%)
fixed_size_expr_evaluator	q08	779.54	779.19	0.35 (0.04%)
fixed_size_expr_evaluator	q09	778.66	782.45	-3.79 (-0.48%)
fixed_size_expr_evaluator	q10	269.13	267.65	1.48 (0.55%)
fixed_size_expr_evaluator	q11	262.59	262.35	0.25 (0.09%)
fixed_size_expr_evaluator	q12	261.23	261.64	-0.41 (-0.16%)
fixed_size_expr_evaluator	q13	1497.02	1497.71	-0.69 (-0.05%)
fixed_size_seq_scan	q23	147.18	146.35	0.82 (0.56%)
join	q31	12.39	12.28	0.10 (0.84%)
ldbc_snb_ic	q35	752.46	1087.33	-334.88 (-30.80%)
ldbc_snb_ic	q36	45.21	41.66	3.55 (8.53%)
ldbc_snb_is	q32	11.01	8.51	2.50 (29.35%)
ldbc_snb_is	q33	19.19	18.52	0.67 (3.62%)
ldbc_snb_is	q34	8.65	8.90	-0.25 (-2.82%)
multi-rel	multi-rel-large-scan	2976.40	2849.47	126.93 (4.45%)
multi-rel	multi-rel-lookup	64.44	60.15	4.29 (7.13%)
multi-rel	multi-rel-small-scan	56.81	63.32	-6.51 (-10.28%)
order_by	q25	156.95	153.82	3.13 (2.03%)
order_by	q26	474.39	475.39	-1.00 (-0.21%)
order_by	q27	1438.21	1434.29	3.92 (0.27%)
scan_after_filter	q01	200.08	198.20	1.87 (0.95%)
scan_after_filter	q02	185.68	186.16	-0.47 (-0.25%)
shortest_path_ldbc100	q39	149.29	155.86	-6.57 (-4.22%)
var_size_expr_evaluator	q03	2084.90	2086.81	-1.92 (-0.09%)
var_size_expr_evaluator	q04	2275.41	2263.25	12.16 (0.54%)
var_size_expr_evaluator	q05	2644.44	2640.74	3.71 (0.14%)
var_size_expr_evaluator	q06	1348.66	1346.79	1.88 (0.14%)
var_size_seq_scan	q19	1507.23	1490.11	17.13 (1.15%)
var_size_seq_scan	q20	3137.75	3153.42	-15.67 (-0.50%)
var_size_seq_scan	q21	2450.70	2455.25	-4.55 (-0.19%)
var_size_seq_scan	q22	134.91	134.86	0.04 (0.03%)