Fix linter issues in jsonld.py

[mielvds]

This PR fixes the ruff linter issues in jsonld.py. Formatting is not yet applied to keep the changes acceptable.
Notable changes:

• rename some internal parameters from camelCase to pythonic, e.g., requestProfile to request_profile. Keys in options dict are kept of course to not introduce breaking changes.
• replace mutable defaults in function parameters with None and initiated them inside the function (no idea why ruff does not like this)
• prefix unused loop variables with _
• merged a couple of nested if statements
• added a stacklevel to logged warnings
• changed some old string formatting to f-strings or ''.format()

[github-actions]

Coverage Report

File	Stmts	Miss	Cover	Missing
lib/pyld
canon.py	218	4	98%	27, 180, 565–566
context_resolver.py	102	8	92%	70, 129, 143, 189, 195–197, 221
iri_resolver.py	141	3	98%	307–308, 318
jsonld.py	2434	171	93%	257–261, 342, 379, 384, 394, 411–423, 459–460, 502, 508, 526, 534–535, 646–650, 729–730, 745–746, 808–812, 836–837, 850–851, 861–862, 887–888, 927, 935, 941–945, 955–956, 990, 999, 1004, 1067, 1088, 1108–1110, 1120–1124, 1139, 1157, 1162–1163, 1253, 1264–1267, 1288, 1340, 1344, 1382, 1423, 1440–1443, 1451, 1487, 1583–1587, 1610–1612, 1617, 1629–1632, 1766, 1781, 2137, 2144–2149, 2208, 2229, 2247, 2254, 2691, 2737, 2740, 2790, 2861, 2889, 2895, 3125, 3131, 3133, 3169, 3320–3324, 3391, 3427, 3471, 3649–3650, 3662, 3903, 4030, 4052, 4081–4084, 4108–4109, 4281, 4344, 4366, 4436, 4438, 4454, 4541, 4583, 4779, 4781, 4816, 4818, 4827, 4941, 5050, 5129, 5246–5254, 5312–5318, 5384, 5593, 5598–5602, 5642, 5645, 5724–5725, 5733
lib/pyld/documentloader
aiohttp.py	65	22	66%	28–38, 69, 75, 87, 99–107, 118–121, 138, 153–155
requests.py	41	5	88%	55, 69, 81–89
TOTAL	3155	213	93%

Tests	Skipped	Failures	Errors	Time
1652	59 💤	0 ❌	0 🔥	10.673s ⏱️