QemuQ35Pkg and QemuSbsaPkg: Add varpolicy shell command (#336)

## Description

Adds the `varpolicy` EFI shell command to both packages.

For more information about the command itself, please review
the mu_basecore pull request:

microsoft/mu_basecore#254

- [x] Impacts functionality?
  - **Functionality** - Does the change ultimately impact how firmware functions?
  - Examples: Add a new library, publish a new PPI, update an algorithm, ...
- [ ] Impacts security?
  - **Security** - Does the change have a direct security impact on an application,
    flow, or firmware?
  - Examples: Crypto algorithm change, buffer overflow fix, parameter
    validation improvement, ...
- [ ] Breaking change?
  - **Breaking change** - Will anyone consuming this change experience a break
    in build or boot behavior?
  - Examples: Add a new library class, move a module to a different repo, call
    a function in a new library class in a pre-existing module, ...
- [x] Includes tests?
  - **Tests** - Does the change include any explicit test code?
  - Examples: Unit tests, integration tests, robot tests, ...
- [ ] Includes documentation?
  - **Documentation** - Does the change contain explicit documentation additions
    outside direct code modifications (and comments)?
  - Examples: Update readme file, add feature readme file, link to documentation
    on an a separate Web page, ...

## How This Was Tested

Verified command functionality in EFI shell.

## Integration Instructions

N/A - Use the command in QEMU EFI shell as follows:

- `"varpolicy"` dumps platform variables
- `"varpolicy -?"` shows help text
- `"varpolicy -b"` pages output as expected
- `"varpolicy -s"` shows accurate variable statistic information
- `"varpolicy -p"` shows accurate UEFI variable policy information
- `"varpolicy-v -b"` dumps all information including variable data hex dump
 
Signed-off-by: Michael Kubacki <[email protected]>

Platforms/QemuQ35Pkg/QemuQ35Pkg.dsc

@@ -1212,6 +1212,10 @@ PlatformSmmProtectionsTestLib|UefiTestingPkg/Library/PlatformSmmProtectionsTestL
     <PcdsFixedAtBuild>
       gEfiShellPkgTokenSpaceGuid.PcdShellLibAutoInitialize|FALSE
   }
+  ShellPkg/DynamicCommand/VariablePolicyDynamicCommand/VariablePolicyDynamicCommand.inf {
+    <PcdsFixedAtBuild>
+      gEfiShellPkgTokenSpaceGuid.PcdShellLibAutoInitialize|FALSE
+  }
   QemuQ35Pkg/LinuxInitrdDynamicShellCommand/LinuxInitrdDynamicShellCommand.inf {
     <PcdsFixedAtBuild>
       gEfiShellPkgTokenSpaceGuid.PcdShellLibAutoInitialize|FALSE

Platforms/QemuQ35Pkg/QemuQ35Pkg.fdf

@@ -384,6 +384,7 @@ INF  FatPkg/EnhancedFatDxe/Fat.inf
 INF  MdeModulePkg/Universal/Disk/UdfDxe/UdfDxe.inf
 
 INF  ShellPkg/DynamicCommand/TftpDynamicCommand/TftpDynamicCommand.inf
+INF  ShellPkg/DynamicCommand/VariablePolicyDynamicCommand/VariablePolicyDynamicCommand.inf
 INF  QemuQ35Pkg/LinuxInitrdDynamicShellCommand/LinuxInitrdDynamicShellCommand.inf
 
 #

Platforms/QemuSbsaPkg/QemuSbsaPkg.dsc

@@ -1214,6 +1214,10 @@
     <PcdsFixedAtBuild>
       gEfiShellPkgTokenSpaceGuid.PcdShellLibAutoInitialize|FALSE
   }
+  ShellPkg/DynamicCommand/VariablePolicyDynamicCommand/VariablePolicyDynamicCommand.inf {
+    <PcdsFixedAtBuild>
+      gEfiShellPkgTokenSpaceGuid.PcdShellLibAutoInitialize|FALSE
+  }
   QemuQ35Pkg/LinuxInitrdDynamicShellCommand/LinuxInitrdDynamicShellCommand.inf {
     <PcdsFixedAtBuild>
       gEfiShellPkgTokenSpaceGuid.PcdShellLibAutoInitialize|FALSE

Platforms/QemuSbsaPkg/QemuSbsaPkg.fdf

@@ -267,6 +267,7 @@ READ_LOCK_STATUS   = TRUE
   }
   INF ShellPkg/DynamicCommand/TftpDynamicCommand/TftpDynamicCommand.inf
   INF ShellPkg/DynamicCommand/HttpDynamicCommand/HttpDynamicCommand.inf
+  INF ShellPkg/DynamicCommand/VariablePolicyDynamicCommand/VariablePolicyDynamicCommand.inf
   INF QemuQ35Pkg/LinuxInitrdDynamicShellCommand/LinuxInitrdDynamicShellCommand.inf
 
   INF MsGraphicsPkg/SimpleWindowManagerDxe/SimpleWindowManagerDxe.inf