Tie rust QueryResult lifetime to that of the Database

[benjaminwinger]

It should be safe to use QueryResults after the connection has been destroyed, but it isn't after the Database has been destroyed.

I've also fixed some warnings and bumped the MSRV since clippy helpfully pointed out that we're using a function that has only been stable since rust 1.67.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 87.78%. Comparing base (4a46184) to head (83a30c9).
Report is 4 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #5009      +/-   ##
==========================================
- Coverage   87.79%   87.78%   -0.01%     
==========================================
  Files        1412     1412              
  Lines       64547    64547              
  Branches     7562     7562              
==========================================
- Hits        56666    56663       -3     
- Misses       7853     7856       +3     
  Partials       28       28              

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[github-actions]

Benchmark Result

Master commit hash: 8cfb6553038cd144cfb0211783441aac326e4919
Branch commit hash: 22c8c3f64550a886dea8abe1afa8a3879cfefc39

Query Group	Query Name	Mean Time - Commit (ms)	Mean Time - Master (ms)	Diff
aggregation	q24	725.26	748.66	-23.40 (-3.13%)
aggregation	q28	6490.71	7316.74	-826.03 (-11.29%)
filter	q14	124.63	155.57	-30.94 (-19.89%)
filter	q15	125.82	151.37	-25.55 (-16.88%)
filter	q16	341.29	351.07	-9.77 (-2.78%)
filter	q17	445.46	453.38	-7.92 (-1.75%)
filter	q18	1975.72	1921.66	54.06 (2.81%)
filter	zonemap-node	88.34	97.36	-9.02 (-9.27%)
filter	zonemap-node-lhs-cast	90.30	97.47	-7.18 (-7.36%)
filter	zonemap-node-null	88.90	97.22	-8.32 (-8.56%)
filter	zonemap-rel	5619.46	5742.78	-123.32 (-2.15%)
fixed_size_expr_evaluator	q07	680.99	695.10	-14.11 (-2.03%)
fixed_size_expr_evaluator	q08	967.63	978.62	-10.99 (-1.12%)
fixed_size_expr_evaluator	q09	963.73	974.26	-10.53 (-1.08%)
fixed_size_expr_evaluator	q10	253.41	270.85	-17.44 (-6.44%)
fixed_size_expr_evaluator	q11	254.03	270.22	-16.19 (-5.99%)
fixed_size_expr_evaluator	q12	232.50	248.16	-15.66 (-6.31%)
fixed_size_expr_evaluator	q13	1596.08	1572.27	23.81 (1.51%)
fixed_size_seq_scan	q23	112.56	126.42	-13.85 (-10.96%)
join	q29	712.27	962.57	-250.30 (-26.00%)
join	q30	1647.70	2178.69	-530.99 (-24.37%)
join	q31	4.69	4.82	-0.14 (-2.85%)
join	SelectiveTwoHopJoin	48.74	45.07	3.68 (8.16%)
ldbc_snb_ic	q35	11.32	10.16	1.17 (11.48%)
ldbc_snb_ic	q36	115.26	101.01	14.25 (14.11%)
ldbc_snb_is	q32	4.05	3.94	0.11 (2.76%)
ldbc_snb_is	q33	11.48	13.69	-2.21 (-16.14%)
ldbc_snb_is	q34	1.23	1.15	0.08 (6.88%)
multi-rel	multi-rel-large-scan	1399.95	1415.65	-15.70 (-1.11%)
multi-rel	multi-rel-lookup	12.43	11.19	1.24 (11.08%)
multi-rel	multi-rel-small-scan	199.98	209.17	-9.19 (-4.39%)
order_by	q25	126.06	138.81	-12.75 (-9.19%)
order_by	q26	448.65	464.55	-15.89 (-3.42%)
order_by	q27	1388.04	1409.30	-21.27 (-1.51%)
recursive_join	recursive-join-bidirection	309.45	311.90	-2.45 (-0.79%)
recursive_join	recursive-join-dense	7161.54	7142.15	19.39 (0.27%)
recursive_join	recursive-join-path	23340.68	23743.69	-403.01 (-1.70%)
recursive_join	recursive-join-sparse	634.93	898.59	-263.65 (-29.34%)
recursive_join	recursive-join-trail	7067.57	7074.84	-7.27 (-0.10%)
scan_after_filter	q01	171.10	185.28	-14.18 (-7.65%)
scan_after_filter	q02	155.47	166.52	-11.06 (-6.64%)
shortest_path_ldbc100	q37	83.68	102.05	-18.37 (-18.00%)
shortest_path_ldbc100	q38	379.33	336.07	43.26 (12.87%)
shortest_path_ldbc100	q39	65.56	65.48	0.08 (0.13%)
shortest_path_ldbc100	q40	359.08	406.31	-47.23 (-11.62%)
var_size_expr_evaluator	q03	2150.93	2113.38	37.55 (1.78%)
var_size_expr_evaluator	q04	2261.67	2218.90	42.78 (1.93%)
var_size_expr_evaluator	q05	2667.03	2721.70	-54.67 (-2.01%)
var_size_expr_evaluator	q06	1345.32	1359.69	-14.37 (-1.06%)
var_size_seq_scan	q19	1436.65	1435.45	1.20 (0.08%)
var_size_seq_scan	q20	2627.11	2684.94	-57.82 (-2.15%)
var_size_seq_scan	q21	2229.11	2246.30	-17.19 (-0.77%)
var_size_seq_scan	q22	129.49	128.73	0.76 (0.59%)