[INTERNAL] Infra: Re-enable overlay for grunt serve
[INTERNAL] Infra: Re-enable overlay for grunt serve

This reverts commit d9494acf72213cb4dd4f08acff7c72ffe7dfdfd0.

Reason for revert: Allow overlay of resources with wrapper projects once the test issues have been solved!

Change-Id: I35800faaeaf2a63d6003233ad3e27428b9b3923e

SAP/openui5,SAP/openui5,SAP/openui5,SAP/openui5