[api] Refactor task server private API endpoints

[Harshg999]

What changes were proposed in this pull request?

• Change taskserver API endpoint URLs for consistency
• Also introduce some request paramater handling because of above change.
• This is required for the ad-hoc taskserver UI refactoring.

How was this patch tested?

• Manually
• Existing unit test suite.

[github-actions]

⚠️ No unit test files modified. Please ensure that changes are properly tested. ⚠️

[github-actions]

Backend Code Coverage Report •

File	Stmts	Miss	Cover	Missing
desktop/core/src/desktop
api2.py	766	246	67%	101–102, 166–167, 212–213, 215–217, 225, 228–229, 237–238, 240, 248, 250–252, 254–255, 265–266, 268, 274–275, 277, 279–280, 290–299, 301, 303–304, 306, 341, 416, 459–465, 472–473, 499, 501–502, 504, 506, 516, 536, 554, 588, 608, 616, 638–639, 641–654, 657–663, 679, 681–682, 684–686, 688, 702, 708, 739–744, 746–748, 754, 757, 764–767, 772, 774, 780, 787–788, 790–793, 795–797, 800–802, 804–807, 809, 814–817, 819–820, 822–826, 828–831, 833, 839–840, 842–843, 845–850, 854–857, 860–871, 873–876, 878, 890, 896, 915, 949–963, 975, 980–981, 985, 996, 1015–1017, 1034, 1051–1053, 1079–1080, 1109, 1156, 1158–1161, 1177, 1179–1180, 1182, 1213–1214, 1216, 1272–1273, 1281–1283, 1315–1316, 1328–1329, 1334–1336, 1338–1341, 1344–1345, 1441, 1445, 1450, 1452
TOTAL	53244	26029	51%

Pytest Report

Tests	Skipped	Failures	Errors	Time
1099	106 💤	0 ❌	0 🔥	5m 46s ⏱️

[ramprasadagarwal]

LGTM, Thanks for making the changes.

[github-actions]

⚠️ No test files modified. Please ensure that changes are properly tested. ⚠️