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,
@@ -41,6 +42,11 @@ def before_case(self, log: Logger, **kwargs: Any) -> None:
                 )
             )
 
+        if node.tools[Lscpu].get_cpu_type() != CpuType.AMD:
+            raise SkippedException(
+                "CVM attestation report supports only SEV-SNP (AMD) CPU."
+            )
+
     @TestCaseMetadata(
         description="""
             Runs get-snp-report tool to generate
@@ -86,6 +92,11 @@ def before_case(self, log: Logger, **kwargs: Any) -> None:
         if not sev_guest_exists:
             raise SkippedException("/dev/sev-guest: Device Not Found")
 
+        if node.tools[Lscpu].get_cpu_type() != CpuType.AMD:
+            raise SkippedException(
+                "CVM attestation report supports only SEV-SNP (AMD) CPU."
+            )
+
     @TestCaseMetadata(
         description="""
             Runs get-snp-report tool to generate