UefiCpuPkg: Add TdxMeasurementLib

[sunceping]

Description

In current implementation, TDX Measurement related codes are in OvmfPkg.
And some of the codes are complicated.
This PR is intended to resolve below 2 issues:

1. Move the code from TdxHelplerLib to a new lib (TdxMeasurementLib).
   It makes the code clearer and easier to maintain
2. Add the TDX Measurement APIs declaration to UefiCpuPkg so that
   it can be called from SecurityPkg (Because it is planning to implement
   SecTpmMeasurementLib which will include both TCG2 measurement and TDX measurement)

Cc: Erdem Aktas [email protected]
Cc: Jiewen Yao [email protected]
Cc: Min Xu [email protected]
Cc: Gerd Hoffmann [email protected]
Cc: Elena Reshetova [email protected]
Cc: Ray Ni [email protected]
Cc: Jiaxin Wu [email protected]
Signed-off-by: Min Xu [email protected]
Signed-off-by: Ceping Sun [email protected]

<Include a description of the change and why this change was made.>

<For each item, place an "x" in between [ and ] if true. Example: [x] (you can also check items in GitHub UI)>

<Create the PR as a Draft PR if it is only created to run CI checks.>

<Delete lines in <> tags before creating the PR.>

• Breaking change?
  • Breaking change - Does this PR cause a break in build or boot behavior?
  • Examples: Does it add a new library class or move a module to a different repo.
• Impacts security?
  • Security - Does this PR have a direct security impact?
  • Examples: Crypto algorithm change or buffer overflow fix.
• Includes tests?
  • Tests - Does this PR include any explicit test code?
  • Examples: Unit tests or integration tests.

How This Was Tested

<Describe the test(s) that were run to verify the changes.>

Integration Instructions

<Describe how these changes should be integrated. Use N/A if nothing is required.>