Install `micromamba` to `/opt/conda/condabin` #511

Job	Run time
Keep alive	0s
linux-anvil-cos7-x86_64:latest (amd64)	56s
linux-anvil-ppc64le:latest (ppc64le)	2m 53s
linux-anvil-aarch64:latest (arm64)	7m 3s
linux-anvil-cuda:11.8 (amd64)	1m 42s
linux-anvil-ppc64le-cuda:11.8 (ppc64le)	8m 16s
linux-anvil-aarch64-cuda:11.8 (arm64)	5m 47s
linux-anvil-alma-x86_64:8 (amd64)	51s
linux-anvil-alma-aarch64:8 (arm64)	2m 30s
linux-anvil-alma-ppc64le:8 (ppc64le)	2m 41s
	32m 39s

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