ProjectExplorer: Introduce a RunConfiguration::buildTargetInfo() function

As convenience function, and use it in some places.

Change-Id: I02e49f2cdc301bbf1261836032d3fa3a5b188446
Reviewed-by: Christian Kandeler <christian.kandeler@qt.io>

src/plugins/projectexplorer/runconfiguration.cpp

@@ -380,6 +380,11 @@ Abi RunConfiguration::abi() const
     return tc->targetAbi();
 }
 
+BuildTargetInfo RunConfiguration::buildTargetInfo() const
+{
+    return target()->applicationTargets().buildTargetInfo(m_buildKey);
+}
+
 bool RunConfiguration::fromMap(const QVariantMap &map)
 {
     if (!ProjectConfiguration::fromMap(map))