sca: added support for Polyspace tool

Add the cmake files for running static code analysis with the Polyspace
tools in the west build. The analysis leverages the compilation database.
Options for the analysis are documented in doc/develop/sca/polyspace.rst.

Analysis results are printed as command line output and provided as CSV.

Manually tested on v4.0.0 with various sample applications.

Signed-off-by: Martin Becker <mbecker@mathworks.com>