Add automatic connection multiplexing

[sebromero]

This PR adds a new class to manage the sockets automatically. This should allow to use multiple client objects to connect to different endpoints concurrently.

[github-actions]

Memory usage change @ e64c4a0

Board	flash	%	RAM for global variables	%
arduino:mbed_portenta:envie_m7	N/A	N/A	N/A	N/A
arduino:renesas_portenta:portenta_c33	🔺 0 - +368	0.0 - +0.02	🔺 0 - +8	0.0 - 0.0

Click for full report table

Board	examples/HTTPClient flash	%	examples/HTTPClient RAM for global variables	%	examples/HTTPSClient flash	%	examples/HTTPSClient RAM for global variables	%	examples/GetTime flash	%	examples/GetTime RAM for global variables	%	examples/GetLocation flash	%	examples/GetLocation RAM for global variables	%	examples/DeleteSMS flash	%	examples/DeleteSMS RAM for global variables	%	examples/ReceiveSMS flash	%	examples/ReceiveSMS RAM for global variables	%	examples/SendSMS flash	%	examples/SendSMS RAM for global variables	%	examples/ModemTerminal flash	%	examples/ModemTerminal RAM for global variables	%
arduino:mbed_portenta:envie_m7	N/A	N/A	N/A	N/A	N/A	N/A	N/A	N/A	N/A	N/A	N/A	N/A	N/A	N/A	N/A	N/A	N/A	N/A	N/A	N/A	N/A	N/A	N/A	N/A	N/A	N/A	N/A	N/A	N/A	N/A	N/A	N/A
arduino:renesas_portenta:portenta_c33	348	0.02	8	0.0	368	0.02	8	0.0	0	0.0	0	0.0	0	0.0	0	0.0	0	0.0	0	0.0	0	0.0	0	0.0	0	0.0	0	0.0	0	0.0	0	0.0

Click for full report CSV

Board,examples/HTTPClient<br>flash,%,examples/HTTPClient<br>RAM for global variables,%,examples/HTTPSClient<br>flash,%,examples/HTTPSClient<br>RAM for global variables,%,examples/GetTime<br>flash,%,examples/GetTime<br>RAM for global variables,%,examples/GetLocation<br>flash,%,examples/GetLocation<br>RAM for global variables,%,examples/DeleteSMS<br>flash,%,examples/DeleteSMS<br>RAM for global variables,%,examples/ReceiveSMS<br>flash,%,examples/ReceiveSMS<br>RAM for global variables,%,examples/SendSMS<br>flash,%,examples/SendSMS<br>RAM for global variables,%,examples/ModemTerminal<br>flash,%,examples/ModemTerminal<br>RAM for global variables,%
arduino:mbed_portenta:envie_m7,N/A,N/A,N/A,N/A,N/A,N/A,N/A,N/A,N/A,N/A,N/A,N/A,N/A,N/A,N/A,N/A,N/A,N/A,N/A,N/A,N/A,N/A,N/A,N/A,N/A,N/A,N/A,N/A,N/A,N/A,N/A,N/A
arduino:renesas_portenta:portenta_c33,348,0.02,8,0.0,368,0.02,8,0.0,0,0.0,0,0.0,0,0.0,0,0.0,0,0.0,0,0.0,0,0.0,0,0.0,0,0.0,0,0.0,0,0.0,0,0.0