tests: skip tics tool installation in self-hosted runners (canonical#…

…13993)

This step is not required because the tool was already installed in the
self-hosted runners. This is needed to avoid requesting the secret with
the tics token.

.github/workflows/static-analysis.yaml

@@ -11,4 +11,3 @@ jobs:
         with:
           projectName: snapd
           ticsConfiguration: https://canonical.tiobe.com/tiobeweb/TICS/api/cfg?name=default
-          installTics: true