Added more optional tests in static analysis stage

Below are the configuration variables used in static analysis tests

• COMMON_IMAGE:
• 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
• Flawfinder with level 3

Compilation test only gets triggered if COMPILE variable is set