Ping command

[fabik111]

This PR adds the Ping command to SocketHelpers making it available from all the IP network interfaces (WiFi, Ethernet, CatM1...).

The method signature is:

  int ping(const char* hostname, uint8_t ttl = 128);
  int ping(const String& hostname, uint8_t ttl = 128);
  int ping(IPAddress host, uint8_t ttl = 128);

[pennam]

Force pushed to fix conflicts and rebase on master. Other changes squashed in the first commit:

• Add comments about ttl
• Remove RP2040 changes in json file

Added patch with ICMPSocket ping. We need to move ping implementation inside libmbed to avoid adding lwIP include paths to the build. lwIP paths were intentionally removed to avoid clashes in non case sensitive systems.

de1baab

Adapt SocketHelpers ping to use ICMPSocket ping

[pennam]

Board	Eth	WiFi
OPTA	👍	👍
H7	👍	👍
GIGA	NA	👍
NV	NA	👍