Move index and overflow files into data.kz

[ray6080]

Description

We used to keep each primary key index as an independent hindex file, along with its ovf file if the key is of STRING type.
This PR unifies both kinds of files with the main data.kz file.

Will add the free space management capability for hash index when dropping the table in a later PR.

[github-actions]

Benchmark Result

Master commit hash: f7ac905402a7f41461c4dbc75e6e8c9191edda77
Branch commit hash: 75dcd7570e629278744515248fe41e21f6497ce5

Query Group	Query Name	Mean Time - Commit (ms)	Mean Time - Master (ms)	Diff
aggregation	q24	665.36	667.72	-2.36 (-0.35%)
aggregation	q28	6507.90	6441.33	66.57 (1.03%)
copy	node-Comment	128455.39	N/A	N/A
copy	node-Forum	5986.73	N/A	N/A
copy	node-Organisation	1299.15	N/A	N/A
copy	node-Person	2184.57	N/A	N/A
copy	node-Place	1215.47	N/A	N/A
copy	node-Post	45611.26	N/A	N/A
copy	node-Tag	1347.85	N/A	N/A
copy	node-Tagclass	1231.58	N/A	N/A
copy	rel-comment-hasCreator	68107.51	N/A	N/A
copy	rel-comment-hasTag	94581.73	N/A	N/A
copy	rel-comment-isLocatedIn	66642.69	N/A	N/A
copy	rel-containerOf	18542.26	N/A	N/A
copy	rel-forum-hasTag	3575.50	N/A	N/A
copy	rel-hasInterest	2750.09	N/A	N/A
copy	rel-hasMember	56927.51	N/A	N/A
copy	rel-hasModerator	1314.32	N/A	N/A
copy	rel-hasType	318.54	N/A	N/A
copy	rel-isPartOf	284.10	N/A	N/A
copy	rel-isSubclassOf	348.10	N/A	N/A
copy	rel-knows	5931.45	N/A	N/A
copy	rel-likes-comment	106501.50	N/A	N/A
copy	rel-likes-post	32469.65	N/A	N/A
copy	rel-organisation-isLocatedIn	299.51	N/A	N/A
copy	rel-person-isLocatedIn	530.99	N/A	N/A
copy	rel-post-hasCreator	15579.01	N/A	N/A
copy	rel-post-hasTag	21657.02	N/A	N/A
copy	rel-post-isLocatedIn	17828.48	N/A	N/A
copy	rel-replyOf-comment	54600.75	N/A	N/A
copy	rel-replyOf-post	44093.73	N/A	N/A
copy	rel-studyAt	561.28	N/A	N/A
copy	rel-workAt	777.12	N/A	N/A
filter	q14	60.40	59.60	0.80 (1.35%)
filter	q15	59.20	58.70	0.50 (0.86%)
filter	q16	273.77	275.92	-2.15 (-0.78%)
filter	q17	380.42	379.43	0.99 (0.26%)
filter	q18	1894.69	1843.59	51.10 (2.77%)
filter	zonemap-node	24.35	23.83	0.52 (2.20%)
filter	zonemap-node-lhs-cast	24.52	24.04	0.47 (1.97%)
filter	zonemap-node-null	24.01	23.87	0.14 (0.58%)
filter	zonemap-rel	5623.86	5653.77	-29.91 (-0.53%)
fixed_size_expr_evaluator	q07	623.62	617.15	6.47 (1.05%)
fixed_size_expr_evaluator	q08	908.82	904.16	4.65 (0.51%)
fixed_size_expr_evaluator	q09	908.20	905.39	2.81 (0.31%)
fixed_size_expr_evaluator	q10	195.97	190.07	5.90 (3.10%)
fixed_size_expr_evaluator	q11	197.03	189.70	7.34 (3.87%)
fixed_size_expr_evaluator	q12	175.75	168.81	6.94 (4.11%)
fixed_size_expr_evaluator	q13	1535.26	1490.37	44.89 (3.01%)
fixed_size_seq_scan	q23	50.41	49.07	1.34 (2.73%)
join	q29	711.40	760.23	-48.83 (-6.42%)
join	q30	1696.73	1642.40	54.33 (3.31%)
join	q31	6.67	4.62	2.05 (44.41%)
join	SelectiveTwoHopJoin	40.74	39.81	0.93 (2.33%)
ldbc_snb_ic	q35	10.49	10.30	0.19 (1.86%)
ldbc_snb_ic	q36	97.49	92.77	4.72 (5.09%)
ldbc_snb_is	q32	6.07	5.04	1.03 (20.48%)
ldbc_snb_is	q33	14.07	13.35	0.72 (5.39%)
ldbc_snb_is	q34	1.23	1.29	-0.06 (-4.75%)
limit	push-down-limit-into-distinct	1977.30	2120.46	-143.15 (-6.75%)
multi-rel	multi-rel-large-scan	2381.14	1784.57	596.57 (33.43%)
multi-rel	multi-rel-lookup	11.41	10.73	0.68 (6.33%)
multi-rel	multi-rel-small-scan	209.13	202.97	6.16 (3.04%)
order_by	q25	64.82	61.62	3.20 (5.20%)
order_by	q26	395.07	376.95	18.12 (4.81%)
order_by	q27	1322.29	1306.49	15.81 (1.21%)
recursive_join	recursive-join-bidirection	323.80	360.46	-36.66 (-10.17%)
recursive_join	recursive-join-dense	6026.26	6960.85	-934.59 (-13.43%)
recursive_join	recursive-join-path	23074.13	23321.02	-246.89 (-1.06%)
recursive_join	recursive-join-sparse	10.18	9.70	0.48 (4.92%)
recursive_join	recursive-join-trail	6362.67	6998.92	-636.25 (-9.09%)
scan_after_filter	q01	103.55	100.68	2.87 (2.85%)
scan_after_filter	q02	89.65	89.46	0.19 (0.21%)
shortest_path_ldbc100	q37	73.72	75.33	-1.61 (-2.14%)
shortest_path_ldbc100	q38	372.50	303.54	68.96 (22.72%)
shortest_path_ldbc100	q39	90.41	90.72	-0.30 (-0.33%)
shortest_path_ldbc100	q40	532.88	493.61	39.28 (7.96%)
var_size_expr_evaluator	q03	2062.09	2042.22	19.87 (0.97%)
var_size_expr_evaluator	q04	2189.89	2158.80	31.09 (1.44%)
var_size_expr_evaluator	q05	2592.88	2595.78	-2.90 (-0.11%)
var_size_expr_evaluator	q06	1279.73	1298.35	-18.62 (-1.43%)
var_size_seq_scan	q19	1373.45	1357.17	16.28 (1.20%)
var_size_seq_scan	q20	2590.38	2611.70	-21.33 (-0.82%)
var_size_seq_scan	q21	2200.17	2199.81	0.36 (0.02%)
var_size_seq_scan	q22	111.36	109.52	1.85 (1.69%)

[codecov]

Codecov Report

Attention: Patch coverage is 94.04762% with 10 lines in your changes missing coverage. Please review.

Project coverage is 86.87%. Comparing base (f7ac905) to head (cbe62e4).
Report is 1 commits behind head on master.

Files with missing lines	Patch %	Lines
src/storage/storage_structure/overflow_file.cpp	89.18%	4 Missing ⚠️
src/storage/shadow_utils.cpp	50.00%	2 Missing ⚠️
src/storage/storage_structure/disk_array.cpp	80.00%	2 Missing ⚠️
src/storage/store/column_reader_writer.cpp	96.42%	1 Missing ⚠️
src/storage/wal/shadow_file.cpp	85.71%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #5386      +/-   ##
==========================================
- Coverage   86.90%   86.87%   -0.03%     
==========================================
  Files        1414     1412       -2     
  Lines       62085    62031      -54     
  Branches     7599     7598       -1     
==========================================
- Hits        53952    53892      -60     
- Misses       7958     7964       +6     
  Partials      175      175              

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