Fix CLI pkg getsrc returns deploy archive instead of source archive (#2941)

* CLI command `pkg getsrc` returns deploy archive

```
Fix CLI command to return source archive instead of deploy archive.
If source archive is not available then return deploy archive.
```

* Add e2e tests for `fission package` CLI commands
* Cleanup environments created for pkg test
* Fix unit test failures


---------

Signed-off-by: Md Soharab Ansari <soharab.ansari@infracloud.io>

pkg/fission-cli/util/constants.go

@@ -24,6 +24,8 @@ const (
 	FISSION_AUTH_TOKEN        = "FISSION_AUTH_TOKEN"
 	FISSION_STORAGE_URI       = "/v1/archive"
 	FISSION_DEFAULT_NAMESPACE = "fission"
+	SOURCE_ARCHIVE            = "source"
+	DEPLOY_ARCHIVE            = "deploy"
 )
 
 const (