sca: Add ECLAIR sca cmake implementation

Add the ECLAIR calls for the zephyr cmake environment to call
ECLAIR while the firmware is build by replacing the actual compiler
call and setup the eclair environment and call the compiler through
the eclair.

The Integration accepts a kconfig file for configuring the
analysis and the generation of the reports. The path of the
kconfig file should be provided via the variable ECLAIR_CONFIG.

db_generation.ecl has be created and introduced instead of
reports.ecl because the report generation is handled by the
sca.cmake directly.

Signed-off-by: Simon Hein <Shein@baumer.com>