Add IPLD Codec Fixtures (#19) #74

Job	Run time
sdist	13s
Build on linux (x86_64 - auto)	3m 48s
Build on linux (aarch64 - auto)	3m 54s
Build on macos (x86_64 - auto)	4m 33s
Build on macos (aarch64 - auto)	4m 12s
Build on windows (x86_64 - auto)	4m 34s
Build on windows (i686 - auto)	5m 0s
Build on windows (aarch64 - auto)	4m 19s
Build on linux (i686 - auto)	5m 36s
Build on linux (armv7 - auto)	3m 10s
Build on linux (x86_64 - musllinux_1_1)	3m 34s
Build on linux (aarch64 - musllinux_1_1)	3m 22s
Build on linux (ppc64le - auto)	3m 0s
Build on linux (s390x - auto)	3m 57s
Release	0s
	53m 12s

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