[sonic-platform-modules] subprocess with no shell

[mohmamedali]

sonic platform scripts use many mechanisms to invoke an external executable. However, doing so may present a security issue if appropriate care is not taken to sanitize any user provided or variable input. If possible, we have to ensure that all external commands called from the program are statically created. currently some vendor started to use safe mechanisms but others still use old ways. is there any plan to unify the development approach?.

[vdahiya12]

@qiluo-msft to check if this is still the case

[qiluo-msft]

@mohmamedali Is should be completed. Do you see any remaining problematic use cases?