chore(deps): update dependency openstacksdk to v4

[renovate]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
openstacksdk	>=3,<4 -> >=4,<5

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[github-actions]

Test coverage for 93f3d8d

Name                                       Stmts   Miss Branch BrPart  Cover   Missing
--------------------------------------------------------------------------------------
src/charm.py                                 577    139    149     26    73%   227-229, 291-310, 328-330, 331->335, 361-365, 438, 445-447, 474-479, 496-501, 522, 534-540, 554-555, 568, 573, 603-604, 606->615, 610->615, 620-626, 660, 664-669, 720-725, 734->737, 760-777, 781-782, 810-837, 850-853, 874-884, 898-900, 947-948, 950-951, 953-954, 1033->1035, 1100-1101, 1139-1141, 1149-1155, 1236-1261, 1270
src/charm_state.py                           468     17    106      5    95%   335-347, 572-576, 698-699, 754-755, 1190->1193, 1197-1198, 1245
src/errors.py                                 43      0      0      0   100%
src/event_timer.py                            54      7      2      1    86%   105-106, 131, 148-149, 165-166
src/firewall.py                               51     18     20      0    61%   42-43, 66-69, 111-185
src/github_client.py                          96     16     40      5    79%   65-72, 119->exit, 124-125, 195, 218, 231-238, 260->300, 294
src/github_type.py                            50      0      0      0   100%
src/logrotate.py                              43      0      2      0   100%
src/lxd_type.py                               35      0      2      0   100%
src/metrics/__init__.py                        0      0      0      0   100%
src/metrics/events.py                         55      2      8      1    95%   56->59, 166-167
src/metrics/github.py                         16      0      0      0   100%
src/metrics/runner.py                        144     10     32      3    91%   164, 190-203, 239, 276, 458-459
src/metrics/runner_logs.py                    24      5      4      1    79%   30-33, 47->46, 51-52
src/metrics/storage.py                        70      8     12      0    90%   89-90, 117-118, 182-183, 189-190
src/metrics/type.py                            5      0      0      0   100%
src/openstack_cloud/__init__.py               26      0      2      0   100%
src/openstack_cloud/openstack_manager.py     568    124    174     22    78%   96, 261, 436-439, 490, 493-504, 538-539, 541-542, 551, 717-744, 884-885, 907->exit, 917, 944-945, 948-949, 992, 1001-1002, 1032, 1037-1044, 1057-1063, 1067-1069, 1085-1091, 1110-1111, 1113-1124, 1131-1135, 1139-1142, 1165-1166, 1171-1177, 1195, 1210-1235, 1260-1274, 1290-1297, 1331, 1445-1450, 1471-1473, 1501-1506, 1528-1529, 1585-1586, 1596-1597
src/reactive/__init__.py                       0      0      0      0   100%
src/reactive/consumer.py                      40      2      6      0    96%   98-101
src/reactive/runner_manager.py                53      0     14      1    99%   102->exit
src/runner_manager_type.py                    51      0      8      0   100%
src/runner_type.py                            37      0     10      0   100%
src/shared_fs.py                              93     17     10      1    83%   51-52, 119-120, 145-146, 154-155, 161-162, 180, 183-184, 196-197, 240-241
src/utilities.py                              68      7     20      7    82%   86->88, 90->96, 103, 133, 147, 186-189, 244
--------------------------------------------------------------------------------------
TOTAL                                       2667    372    621     73    84%

Static code analysis report

Run started:2024-09-02 17:20:58.096325

Test results:
  No issues identified.

Code scanned:
  Total lines of code: 9446
  Total lines skipped (#nosec): 4
  Total potential issues skipped due to specifically being disabled (e.g., #nosec BXXX): 7

Run metrics:
  Total issues (by severity):
  	Undefined: 0
  	Low: 0
  	Medium: 0
  	High: 0
  Total issues (by confidence):
  	Undefined: 0
  	Low: 0
  	Medium: 0
  	High: 0
Files skipped (0):

[amandahla]

From release notes, no breaking changes.
https://docs.openstack.org/releasenotes/openstacksdk/unreleased.html#relnotes-4-0-0

[renovate]

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