Fix following MISRA issues :
MISRA Rule 8_5 : Symbol "FreeRTOS_inet_ntop6" is declared more than once.
MISRA Rule 8_9 : Symbol "FreeRTOS_in6addr_loopback" should be defined at block scope.
MISRA Rule 8_8 : missing static storage modifier for "prvCloseDHCPSocket" which has internal linkage.
MISRA Rule 9_1 : Using uninitialized value "xRemoteIP.xIs_IPv6" when calling "pxTCPSocketLookup".
MISRA Rule 9_1 : Using uninitialized value "pxAddress->sin_family" when calling "prvSocketBindAdd".
MISRA Rule 11_3 : A cast shall not be performed between two pointer of different object type.
MISRA Rule 12_1 : Missing parentheses on sub-expression of the operator.
MISRA Rule 14.4 : The condition expression 0 does not have an essentially boolean type
MISRA Rule 15_6 : The body of the "then" branch of the "if" statement is not a compound statement.
MISRA Rule 17_7 : The return value of a non-void function "memset" is unused.
MISRA Rule 20_5 : Using "#undef".
MISRA Rule 20_10 : Use of "#" or "##" preprocessor operator.
MISRA Rule 21_1 : Defining or undefining a reserved name "_static", which is an identifier or macro name beginning with an underscore.
MISRA Rule 21_15 : Calling function "memcmp" with incompatible types "void " and "uint8_t const ()[6]".
* Use new version of CI-CD Actions, checkout@v3 instead of checkout@v2 on all jobs
* Use cSpell spell check, and use ubuntu-20.04 for formatting check
* Add in bot formatting action
