wifi: samples: Shell: Set CONFIG_HOSTAP_CRYPTO_ALT_LEGACY_PSA

-Previously there may have been a CONFIG_HOSTAP_CRYPTO_LEGACY_PSA config
 but this is causing build-failures. This commit updates
 shell-sample to use CONFIG_HOSTAP_CRYPTO_ALT_LEGACY_PSA as extra_args

Signed-off-by: Frank Audun Kvamtrø <[email protected]>

Author: frkv

samples/wifi/shell/sample.yaml

@@ -457,7 +457,7 @@ tests:
       - ci_samples_wifi
   sample.nrf7002.shell.psa:
     build_only: true
-    extra_args: CONFIG_HOSTAP_CRYPTO_LEGACY_PSA=y
+    extra_args: CONFIG_HOSTAP_CRYPTO_ALT_LEGACY_PSA=y
     integration_platforms:
       - nrf7002dk/nrf5340/cpuapp
     platform_allow: nrf7002dk/nrf5340/cpuapp