Update wrapper generation script and regenerate

Update the guards generated by the wrapper generation script to use
!MBEDTLS_PSA_ASSUME_EXCLUSIVE_BUFFERS and regenerate the PSA test
wrappers.

Signed-off-by: David Horstmann <david.horstmann@arm.com>
diff --git a/tests/scripts/generate_psa_wrappers.py b/tests/scripts/generate_psa_wrappers.py
index 1a05c75..07d1450 100755
--- a/tests/scripts/generate_psa_wrappers.py
+++ b/tests/scripts/generate_psa_wrappers.py
@@ -132,10 +132,10 @@
         """
         if not buffer_parameters:
             return
-        out.write('#if defined(MBEDTLS_PSA_COPY_CALLER_BUFFERS)\n')
+        out.write('#if !defined(MBEDTLS_PSA_ASSUME_EXCLUSIVE_BUFFERS)\n')
         for param in buffer_parameters:
             self._write_poison_buffer_parameter(out, param, poison)
-        out.write('#endif /* defined(MBEDTLS_PSA_COPY_CALLER_BUFFERS) */\n')
+        out.write('#endif /* !defined(MBEDTLS_PSA_ASSUME_EXCLUSIVE_BUFFERS) */\n')
 
     @staticmethod
     def _parameter_should_be_copied(function_name: str,