fix: update AMD host cpu features checks

Nested virtualization is now disabled and some cpu features/MSRs now
should be marked as host only.

These cpu features/MSRs are described the AMD reference manual at
"SVM Revision and Feature Identification" section.

Signed-off-by: Egor Lazarchuk <yegorlz@amazon.co.uk>

Author: ShadowCurse

tests/integration_tests/functional/test_cpu_features_host_vs_guest.py

@@ -120,6 +120,9 @@
     "vgif",
     "vmcb_clean",
     "wdt",
+    "npt",
+    "nrip_save",
+    "svm",
 }
 
 AMD_GUEST_ONLY_FEATS = {
@@ -130,14 +133,7 @@
 }
 
 AMD_MILAN_HOST_ONLY_FEATS_6_1 = AMD_MILAN_HOST_ONLY_FEATS - {
-    "lbrv",
-    "pausefilter",
-    "pfthreshold",
     "sme",
-    "tsc_scale",
-    "v_vmsave_vmload",
-    "vgif",
-    "vmcb_clean",
 } | {"brs", "rapl", "v_spec_ctrl"}
 
 AMD_GENOA_HOST_ONLY_FEATS = AMD_MILAN_HOST_ONLY_FEATS | {