[SYS] Multiple connections management (#1947)

Enable the management of different connections at runtime with a set of certs for each.
Add parameters to the WiFi Manager onboarding, client certificates, and certificate validation

.github/workflows/build.yml

@@ -62,7 +62,6 @@ jobs:
           - "nodemcuv2-rf-cc1101"
           - "nodemcuv2-somfy-cc1101"
           - "manual-wifi-test"
-          - "nodemcuv2-mqtt-fw-test"
           - "rf-wifi-gateway"
           - "nodemcuv2-rf2"
           - "nodemcuv2-rf2-cc1101"