Mamba

fix: Return JSON on environment creation dry run #1870

Job	Run time
Homebrew and Linuxbrew toolchains / Build on homebrew	6m 24s
Homebrew and Linuxbrew toolchains / Build on linuxbrew	5m 23s
Unix (macos-latest, debug) / Build binaries	1m 8s
Unix (macos-latest, release) / Build binaries	58s
Unix (ubuntu-latest, debug) / Build binaries	54s
Unix (ubuntu-latest, release) / Build binaries	38s
Windows (windows-2019, release) / Build binaries	2m 39s
Unix (ubuntu-latest, release) / libmamba tests	45s
Unix (ubuntu-latest, release) / mamba integration tests	2m 47s
Unix (ubuntu-latest, release) / libmambapy tests	1m 26s
Unix (ubuntu-latest, release) / mamba-content-trust tests	20s
Unix (ubuntu-latest, debug) / mamba integration tests	3m 10s
Unix (ubuntu-latest, debug) / libmambapy tests	1m 30s
Unix (ubuntu-latest, debug) / mamba-content-trust tests	21s
Unix (ubuntu-latest, debug) / libmamba tests	1m 2s
Unix (macos-latest, release) / libmamba tests	1m 46s
Unix (macos-latest, release) / libmambapy tests	1m 18s
Unix (macos-latest, release) / mamba-content-trust tests	0s
Unix (macos-latest, release) / mamba integration tests	5m 3s
Unix (macos-latest, debug) / libmambapy tests	1m 5s
Unix (macos-latest, debug) / libmamba tests	1m 3s
Unix (macos-latest, debug) / mamba integration tests	5m 28s
Unix (macos-latest, debug) / mamba-content-trust tests	0s
Windows (windows-2019, release) / mamba integration tests	8m 51s
Windows (windows-2019, release) / libmambapy tests	3m 12s
Windows (windows-2019, release) / libmamba tests	3m 25s
	1h 0m 36s

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