VHE: Modify kokoro test scripts to run VHE tests

This patch modifies test.sh and test_spmc.sh to allow running hafnium
tests on VHE enabled builds of hafnium and SPMC. This patch also adds
the option to run only EL0 partition tests through a command line
options.
Example commands:
./kokoro/test.sh --vhe
./kokoro/test.sh --vhe --el0
./kokoro/test.sh --vhe --el0 --fvp
./kokoro/test_spmc.sh --vhe

Signed-off-by: Raghu Krishnamurthy <raghu.ncstate@gmail.com>
Change-Id: Iac9e4c1d82b0d944896eec47fe35e0332e42d958
diff --git a/test/hftest/hftest.py b/test/hftest/hftest.py
index 359c071..e3df464 100755
--- a/test/hftest/hftest.py
+++ b/test/hftest/hftest.py
@@ -367,6 +367,8 @@
             f"cluster0.cpu0={self.FVP_PREBUILT_BL31}@{self.CPU_START_ADDRESS}",
             "-C", "bp.ve_sysregs.mmbSiteDefault=0",
             "-C", "bp.ve_sysregs.exit_on_shutdown=1",
+            "-C", "cluster0.has_arm_v8-1=1",
+            "-C", "cluster1.has_arm_v8-1=1",
         ]
 
         if uart0_log_path and uart1_log_path: