Time domain samples scope for NR UE

Add a new scope data source (ueTimeDomainSamples) which provides time domain samples
for antenna 0 to the scope. Add graphical representation of the data in imscope.

Removed C-define from ENABLE_IMSCOPE cmake option, the #define was unused and this way
code does not have to be recompiled when imscope enable state changes.

openair1/PHY/TOOLS/phy_scope_interface.h

@@ -73,6 +73,7 @@ enum scopeDataType {
   MAX_SCOPE_TYPES,
   gNBPuschRxIq = MAX_SCOPE_TYPES,
   gNBPuschLlr,
+  ueTimeDomainSamples,
   EXTRA_SCOPE_TYPES
 };