[nrf noup] samples: net: wifi: Changes for EAP-TLS support

Enable wifi sample to connect in EAP-TLS mode. Create sample
certificates.

Signed-off-by: Ravi Dondaputi <[email protected]>
(cherry picked from commit d4911e8)

Author: rado17

samples/net/wifi/overlay-enterprise.conf

@@ -7,4 +7,4 @@ CONFIG_NET_BUF_RX_COUNT=36
 # For TLS and X.509 processing MbedTLS needs large heap size and using separate heap
 # for MbedTLS gives us more control over the heap size.
 CONFIG_MBEDTLS_ENABLE_HEAP=y
-CONFIG_MBEDTLS_HEAP_SIZE=55000
+CONFIG_MBEDTLS_HEAP_SIZE=70000

samples/net/wifi/prj.conf

@@ -31,6 +31,10 @@ CONFIG_NET_STATISTICS_PERIODIC_OUTPUT=n
 CONFIG_WIFI=y
 CONFIG_WIFI_LOG_LEVEL_ERR=y
 CONFIG_NET_L2_WIFI_SHELL=y
+
+CONFIG_MBEDTLS_ENABLE_HEAP=y
+CONFIG_MBEDTLS_HEAP_SIZE=70000
+
 # printing of scan results puts pressure on queues in new locking
 # design in net_mgmt. So, use a higher timeout for a crowded
 # environment.