Clang Static Analyzer: Re-enable for all project managers and tool chains

This reverts commit 6b77dea6 and also
removes checks for the specific tool chains and thus makes it possible
to start the clang static analyzer independent of the specific
project/toolchain.

Though we only support and test qbs/qmake projects with certain
toolchains, users reported that they also had useful results for cmake
projects.

Task-number: QTCREATORBUG-15980
Change-Id: I27834c148c1a0d7855bebad0bb203bd807e7ad46
Reviewed-by: Christian Kandeler <christian.kandeler@theqtcompany.com>
Reviewed-by: Eike Ziller <eike.ziller@qt.io>