Input cleaning can result in missing outputs

[brentleyjones]

Describe the bug

Ordering of input cleaning can result in missing outputs, if the outputs are inputs into another action:

buildbuddy/enterprise/server/remote_execution/runner/runner.go

Line 229 in 97505b4

if err := r.Workspace.CreateOutputDirs(); err != nil {

is called before

buildbuddy/enterprise/server/remote_execution/workspace/workspace.go

Line 203 in 4a626d5

if err := ws.CleanInputsIfNecessary(txInfo.Exists); err != nil {