Links from Grafana to Coin are broken because of the project slash being escaped

https://testresults.qt.io/grafana/d/000000009/coin-single-test-details?var-project=qt%2Fqtbase&var-testcase=tests%2Fauto%2Fwidgets%2Fwidgets%2Fqsplitter&orgId=1

As example has links to the Coin integration details. The links are broken due to encoding e.g. qt/qtbase as qt%2F:

https://testresults.qt.io/coin/integration/qt%2Fqtbase/tasks/1540376434

There is a fix to this so this is easy to resolve: By default Grafana encodes parts of the link, to avoid that, we need to pass the data as raw:

${project:raw} instead of just $project