imgproc: C-API cleanup, drawContours refactor #5877

Job	Run time
Android-SDK / BuildAndTestSDK	48m 22s
Ubuntu2004-ARM64 / BuildAndTest	43m 46s
Ubuntu2004-ARM64 / BuildContrib	18m 23s
Ubuntu2004-x64-OpenVINO / BuildAndTest	21m 32s
Ubuntu2004-ARM64-Debug / BuildAndTest	1h 6m 50s
Ubuntu2004-ARM64-Debug / BuildContrib	9m 45s
Ubuntu2004-x64 / BuildAndTest	33m 27s
Ubuntu2004-x64 / BuildContrib	2m 40s
Ubuntu2204-x64 / BuildAndTest	32m 13s
Ubuntu2204-x64 / BuildContrib	1m 45s
Windows10-ARM64 / CrossBuild	11m 27s
Android-Test / BuildAndTest	5m 14s
docs / BuildAndTest	5m 34s
Windows10-x64 / BuildAndTest	1h 0m 20s
Windows10-x64 / BuildContrib	24m 12s
Windows10-x64-Vulkan / BuildAndTest	24m 59s
iOS / Build	16m 58s
Linux-RISC-V-Clang / BuildAndTest	36m 17s
Linux-RISC-V-Clang / BuildContrib	58s
macOS-ARM64 / BuildAndTest	13m 0s
macOS-ARM64 / BuildContrib	2m 21s
macOS-ARM64-Vulkan / BuildAndTest	5m 21s
macOS-x64 / BuildAndTest	26m 57s
macOS-x64 / BuildContrib	3m 6s
TIM-VX / x86-simulator-build-test	29m 59s
Ubuntu2004-x64-CUDA / BuildAndTest	8m 19s
TIM-VX / khadas-vim3-tests	0s
	9h 13m 45s

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