Don't remove app from cache if env xists #77

Job	Run time
build / build (windows-latest, cement)	5m 25s
build / build (windows-latest, nuget)	3m 59s
build / build (ubuntu-latest, cement)	1m 28s
build / build (ubuntu-latest, nuget)	1m 5s
build / build (macos-12, cement)	2m 21s
build / build (macos-12, nuget)	1m 56s
test / test (windows-latest, cement, net6.0)	4m 15s
test / test (windows-latest, cement, netcoreapp2.1)	4m 10s
test / test (windows-latest, cement, net471)	3m 57s
test / test (windows-latest, nuget, net6.0)	3m 11s
test / test (windows-latest, nuget, netcoreapp2.1)	5m 1s
test / test (windows-latest, nuget, net471)	4m 31s
test / test (ubuntu-latest, cement, net6.0)	1m 34s
test / test (ubuntu-latest, cement, netcoreapp2.1)	1m 22s
test / test (ubuntu-latest, nuget, net6.0)	1m 20s
test / test (ubuntu-latest, nuget, netcoreapp2.1)	1m 33s
publish	0s
	47m 8s

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