Add SP800-108 KDF modes #894 #1154

Job	Run time
build_python_27 (windows-latest, yes)	4m 36s
build_python_27 (ubuntu-22.04, yes)	2m 50s
mypy	22s
build_python_27 (ubuntu-22.04, no)	2m 46s
test_c_linux (0, x64)	1m 4s
test_c_linux (0, x32)	1m 12s
test_c_linux (1, x64)	1m 21s
python_no_gil	5m 44s
test_c_windows (windows-latest, x64)	38s
build_python_27 (windows-latest, no)	4m 35s
test_c_windows (windows-latest, win32)	49s
test_c_windows (windows-11-arm, arm64)	1m 4s
test_c_linux (1, x32)	1m 33s
build (3.7, yes, ubuntu-22.04)	2m 41s
build (3.8, yes, ubuntu-22.04)	2m 34s
build (3.9, no, ubuntu-22.04)	4m 51s
build (3.7, no, ubuntu-22.04)	2m 42s
build (3.10, no, ubuntu-22.04)	4m 39s
build (3.9, yes, ubuntu-22.04)	5m 7s
build (3.10, yes, ubuntu-22.04)	4m 59s
build (3.8, no, ubuntu-22.04)	2m 36s
build (3.13, no, ubuntu-22.04)	4m 50s
build (3.11, yes, ubuntu-22.04)	4m 38s
build (3.11, no, ubuntu-22.04)	4m 32s
build (3.13, no, windows-11-arm)	4m 49s
build (3.13, yes, macos-13)	6m 54s
build (3.12, no, ubuntu-22.04)	4m 37s
build (3.13, yes, ubuntu-22.04)	4m 48s
build (3.12, yes, ubuntu-22.04)	4m 47s
build (3.13, yes, windows-latest)	4m 32s
build (3.13, no, windows-latest)	4m 40s
build (3.13, yes, windows-11-arm)	5m 0s
build (pypy3.9, no, ubuntu-latest)	4m 14s
build (3.13, yes, ubuntu-22.04-arm)	4m 57s
build (pypy2.7, no, ubuntu-latest)	1m 40s
	2h 3m 41s

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