Features/ManageabilityPkg: Move Package from edk2-platforms to edk2

[PrachotanReddy]

ManageabilityPkg is not platform-specific and is consumed as a general-purpose package. Move it from edk2-platforms into the edk2 tree to better reflect its scope and reduce cross-repo dependencies.

[abdattar]

looks good to me, usually large changes will be first ported edk2-staging branch first before merging to edk2 master branch.
@changab any comments.

[PrachotanReddy]

checking in to see if there's any other comments that need to be resolved to close this PR

[mdkinney]

There are many general purpose feature packages in edk2-platforms.

What is the reason that this one package should be moved?

What is the criteria being used to propose moving package from edk2-platforms to edk2?

[PrachotanReddy]

This is a host standard interface for manageability and therefore should be considered a core feature rather than a platform feature. Additionally this allows downstream platforms not on edk2-platforms to consume this directly.
@gtossk2 @samerhaj

[changab]

We must ensure that all platforms under edk2-platform have the correct references of ManageabiltyPkg on edk2.

1. Let's get ManageabilityPkg merged to edk2 first.
2. Then update all platforms to use ManageabiltyPkg from edk2.
3. Remove ManageabiltyPkg on edk2-platform.

However, @mdkinney, do you agree with this migration?

[abdattar]

Looks good to me.

[changab]

@PrachotanReddy, I will give my approval and merge this change once we update all platforms that reference ManageabilityPkg under ekd2-platforms to edk2.
Thanks for this contribution.

[mdkinney]

Please do not merge yet. I am still running some tests.

[changab]

Please check here: #942 for the edk2 CI fix and address the feedback.
@PrachotanReddy @abdattar @mdkinney @leiflindholm @ardbiesheuvel @makubacki