[search api] enable /v2/resolve api (#1807)

## Summary

@gcurtis confirmed this is ready to enable now that the API has updated

## How was it tested?

compiles?

Author: savil

internal/boxcli/featureflag/resolvev2.go

@@ -1,4 +1,4 @@
 package featureflag
 
 // ResolveV2 uses the /v2/resolve endpoint when resolving packages.
-var ResolveV2 = disable("RESOLVE_V2")
+var ResolveV2 = enable("RESOLVE_V2")