test configs: Test Experimental API on K64F/K66F

When using the `mbed test` command to build and run tests, some
targets have additional configurations/overrides defined in
`tools/test_configs/`:
* `target_configs.json` lists which targets support which configs.
* `config_paths.json` maps the name of each config to the JSON file to
use.

By default, only `default_test_configuration` from
`target_configs.json` gets used when building and running tests.
Others listed in `test_configuration` need to be switched via
`--test-config <NAME>`.

This commit enables Experimental API in the default configurations of
K64F and K66F in order to test Mbed OS PSA. Any existing configs are
kept, which is why `HeapBlockDeviceAndEthernetAndExperimental.json` is
created for K64F.

tools/test_configs/HeapBlockDeviceAndEthernetAndExperimental.json

@@ -0,0 +1,37 @@
+{
+    "config": {
+        "echo-server-addr" : {
+            "help" : "IP address of echo server",
+            "value" : "\"echo.mbedcloudtesting.com\""
+        },
+        "echo-server-port" : {
+            "help" : "Port of echo server",
+            "value" : "7"
+        },
+        "echo-server-discard-port" : {
+            "help" : "Discard port of echo server",
+            "value" : "9"
+        },
+        "echo-server-port-tls" : {
+            "help" : "Port of echo server for TLS",
+            "value" : "2007"
+        },
+        "echo-server-discard-port-tls" : {
+            "help" : "Discard port of echo server for TLS",
+            "value" : "2009"
+        },
+        "sim-blockdevice": {
+            "help": "Simulated block device, requires sufficient heap",
+            "macro_name": "MBED_TEST_SIM_BLOCKDEVICE",
+            "value": "HeapBlockDevice"
+        }
+    },
+    "target_overrides": {
+        "*": {
+            "target.network-default-interface-type": "ETHERNET",
+            "target.features_add": [
+                "EXPERIMENTAL_API"
+            ]
+        }
+    }
+}

tools/test_configs/config_paths.json

@@ -1,7 +1,9 @@
 {
     "ETHERNET" : "EthernetInterface.json",
+    "EXPERIMENTAL": "experimental.json",
     "HEAPBLOCKDEVICE": "HeapBlockDevice.json",
     "HEAPBLOCKDEVICE_AND_ETHERNET": "HeapBlockDeviceAndEthernetInterface.json",
+    "HEAPBLOCKDEVICE_AND_ETHERNET_AND_EXPERIMENTAL": "HeapBlockDeviceAndEthernetAndExperimental.json",
     "HEAPBLOCKDEVICE_AND_WIFI": "HeapBlockDeviceAndWifiInterface.json",
     "ESP8266_WIFI" : "ESP8266Interface.json",
     "ISM43362_WIFI" : "ISM43362Interface.json",

tools/test_configs/experimental.json

@@ -0,0 +1,9 @@
+{
+    "target_overrides": {
+        "*": {
+             "target.features_add": [
+                 "EXPERIMENTAL_API"
+             ]
+        }
+    }
+}

tools/test_configs/target_configs.json

@@ -1,8 +1,11 @@
 {
     "K64F": {
-        "default_test_configuration": "HEAPBLOCKDEVICE_AND_ETHERNET",
+        "default_test_configuration": "HEAPBLOCKDEVICE_AND_ETHERNET_AND_EXPERIMENTAL",
         "test_configurations": ["HEAPBLOCKDEVICE_AND_ETHERNET", "NANOSTACK_MAC_TESTER", "ESP8266_WIFI", "ETHERNET"]
     },
+    "K66F": {
+        "default_test_configuration": "EXPERIMENTAL"
+    },
     "NUCLEO_F429ZI": {
         "default_test_configuration": "HEAPBLOCKDEVICE_AND_ETHERNET",
         "test_configurations": ["HEAPBLOCKDEVICE_AND_ETHERNET", "NANOSTACK_MAC_TESTER"]