Added more optional tests in static analysis stage

Below are the configuration variables used in static analysis tests
 - COMMON_IMAGE: <Docker image to use for test>
 - SOURCE_FOLDER: <Source directory path, default src>
 - SHELL_SRC: <Shell script path for shellcheck, default disabled>
 - FLAWFINDER_OPTIONS: <Options used with flawfinder,
    default "-m 4 --error-level=4">
 - CPPCHECK_OPTIONS: <Options to use with cppcheck,
    default "--suppress=unusedFunction --suppress=unreadVariable">
 - CPD_OPTIONS: <Options to use with CPD check,
    default "--minimum-tokens 200 --language c --exclude ./test/cmocka --files">
 - SHELLCHECK_OPTIONS: <ShellCheck options,
    default "-e SC2039,SC2034,SC1091 -S info">
 - COMPILE: <Option to define how to compile,
    if defined compilation test also triggered as a pipeline job>

Variables can be Overridden by module tests
Optional test includes
 - ShellCheck if SHELL_SRC defined
 - CppCheck with threadsafety addon
 - CppCheck with cert addon