Add EdDSA and XTS to the allow list

As specified in
https://github.com/Mbed-TLS/mbedtls/issues/5390#issuecomment-1669585707
EdDSA and XTS tests are legitimately never executed, so add them to
the allow list.

Signed-off-by: Tomás González <tomasagustin.gonzalezorlando@arm.com>

tests/scripts/analyze_outcomes.py

@@ -180,7 +180,11 @@ TASKS = {
     'analyze_coverage':                 {
         'test_function': do_analyze_coverage,
         'args': {
-            'allow_list': [],
+            'allow_list': [
+                'test_suite_psa_crypto_metadata;Asymmetric signature: '
+                'pure EdDSA',
+                'test_suite_psa_crypto_metadata;Cipher: XTS'
+                ],
             'full_coverage': False,
         }
         },