cvm_attestation: Skip Intel processors

Based on the test case description and steps, it looks like it is only designed to run on SEV-SNP, not on TDX or SGX SKUs. This matches test failure observations

microsoft/testsuites/cvm/cvm_attestation.py

@@ -16,7 +16,8 @@
 from lisa.operating_system import Ubuntu
 from lisa.sut_orchestrator import AZURE
 from lisa.testsuite import TestResult, simple_requirement
-from lisa.tools import Ls
+from lisa.tools import Ls, Lscpu
+from lisa.tools.lscpu import CpuType
 from lisa.util import SkippedException, UnsupportedDistroException
 from microsoft.testsuites.cvm.cvm_attestation_tool import (
     AzureCVMAttestationTests,
@@ -61,6 +62,10 @@ def verify_azure_cvm_attestation_report(
         result: TestResult,
         variables: Dict[str, Any],
     ) -> None:
+        if node.tools[Lscpu].get_cpu_type() != CpuType.AMD:
+            raise SkippedException(
+                "CVM attestation report supports only SEV-SNP (AMD) CPU."
+            )
         node.tools[AzureCVMAttestationTests].run_cvm_attestation(
             result,
             environment,
@@ -105,6 +110,10 @@ def verify_nested_cvm_attestation_report(
         result: TestResult,
         variables: Dict[str, Any],
     ) -> None:
+        if node.tools[Lscpu].get_cpu_type() != CpuType.AMD:
+            raise SkippedException(
+                "CVM attestation report supports only SEV-SNP (AMD) CPU."
+            )
         host_data = variables.get("host_data", "")
         if not host_data:
             raise SkippedException("host_data is empty")