.pytool: Update CI Settings to support Emulator, ArmVirt, and Ovmf packages

REF:https://bugzilla.tianocore.org/show_bug.cgi?id=2570

Update pytools configuration to enable EmulatorPkg, ArmVirtPkg,
and OvmfPkg.

Update documentation for the status of those packages.
Remove future work items that are now complete.

Cc: Sean Brogan <sean.brogan@microsoft.com>
Cc: Bret Barkelew <Bret.Barkelew@microsoft.com>
Cc: Michael D Kinney <michael.d.kinney@intel.com>
Cc: Liming Gao <liming.gao@intel.com>
Signed-off-by: Michael Kubacki <michael.kubacki@microsoft.com>

Reviewed-by: Shenglei Zhang <shenglei.zhang@intel.com>
Reviewed-by: Bret Barkelew <bret.barkelew@microsoft.com>

.pytool/CISettings.py

@@ -39,7 +39,9 @@ class Settings(CiBuildSettingsManager, UpdateSettingsManager, SetupSettingsManag
         ''' return iterable of edk2 packages supported by this build.
         These should be edk2 workspace relative paths '''
 
-        return ("MdePkg",
+        return ("ArmVirtPkg",
+                "EmulatorPkg",
+                "MdePkg",
                 "MdeModulePkg",
                 "NetworkPkg",
                 "PcAtChipsetPkg",
@@ -49,7 +51,8 @@ class Settings(CiBuildSettingsManager, UpdateSettingsManager, SetupSettingsManag
                 "ShellPkg",
                 "FatPkg",
                 "CryptoPkg",
-                "UnitTestFrameworkPkg"
+                "UnitTestFrameworkPkg",
+                "OvmfPkg"
                 )
 
     def GetArchitecturesSupported(self):