CI: recreate conda env from conda-forge to avoid mixed-channel solve #3919

Job	Run time
test-vulkan / test-backend-linux (vulkan, operators) / linux-job	20m 14s
test-vulkan / test-backend-linux (vulkan, models) / linux-job	20m 30s
test-vulkan / test-backend-macos	0s
test-vulkan / package-golden-artifacts	3m 41s
	44m 25s

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