Reimplement managed raster class in C++ #4025

Job	Run time
Check RST syntax	12s
Check for syntax errors	8s
Run Workbench Tests (windows-latest)	6m 37s
Run model tests (3.8, windows-latest)	5m 35s
Run Workbench Tests (macos-13)	3m 16s
Build sampledata archives	4m 6s
Run model tests (3.8, macos-13)	6m 8s
Build binaries (macos-13)	8m 48s
Run model tests (3.9, windows-latest)	8m 10s
Build binaries (windows-latest)	10m 37s
Run model tests (3.9, macos-13)	2m 52s
Validate Sampledata & User Guide	4m 49s
Run model tests (3.10, windows-latest)	5m 5s
Run model tests (3.10, macos-13)	5m 3s
Check sdist (3.8, windows-latest)	2m 52s
Run model tests (3.11, windows-latest)	13m 32s
Check sdist (3.8, macos-13)	1s
Run model tests (3.11, macos-13)	6m 21s
Check sdist (3.9, windows-latest)	2m 27s
Run model tests (3.12, windows-latest)	3m 41s
Check sdist (3.9, macos-13)	1s
Run model tests (3.12, macos-13)	6m 3s
Check sdist (3.10, windows-latest)	3m 32s
Check sdist (3.10, macos-13)	1m 42s
Check sdist (3.11, windows-latest)	2m 38s
Check sdist (3.11, macos-13)	1s
Check sdist (3.12, windows-latest)	2m 36s
Check sdist (3.12, macos-13)	1s
	1h 56m 54s

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