feat: pass calling SessionContext to Python UDTF callbacks #488

Job	Run time
build / lint-toml	12s
build / lint-python	12s
build / generate-license	2m 27s
build / lint-rust	27s
build / check-crates-patch	0s
build / ManyLinux x86_64	15m 35s
build / ManyLinux arm64	12m 41s
build / macOS arm64 & Windows (3.10, macos-latest)	9m 41s
build / macOS arm64 & Windows (3.10, windows-latest)	14m 21s
build / Source distribution	0s
build / build-macos-x86_64	0s
build / Merge build artifacts	1s
build / Build docs	1s
test	-1s
	55m 37s

Provide feedback