[roll] Roll fuchsia Revert "[build][sdk] Add validation targets to generate_final_idk()"

This reverts commit 87ac6da38a71141cecdd6ed70b92bc9e2f218d99.

Reason for revert: breaking sdk-core-mac: https://go/bbid/8771506719262728129

Original change's description:
> [build][sdk] Add validation targets to generate_final_idk()
>
> This CL modifies generate_final_idk() in several ways to
> improve the way the final export directory is validated:
>
> - Add new arguments to specify list of targets to build
>   for validation purposes.
>
>   final_validation_target_labels lists targets that are
>   only run in the top-level build and can depend on
>   ${target_name}.exported (i.e. the exported directory
>   containing the final merged files).
>
>   validation_target_labels lists targets that are
>   built in the top-level build, as well as each sub-build
>   launched by the template.
>
> - The template now creates a ${target_name}.validation
>   implicit target that builds all validation dependencies,
>   after creating the final export dir, without creating
>   the compressed archive.
>
> + Modify //sdk:final_fuchsia_idk to invoke
>   //build/bazel/bazel_sdk:bazel_sdk_tests_idk whenever a
>   Fuchsia Core IDK archive is generated, to validate its
>   content.
>
> Original-Bug: 132279
> Original-Bug: 132283
> Original-Reviewed-on: https://fuchsia-review.googlesource.com/c/fuchsia/+/903978

Original-Bug: 132279
Original-Bug: 132283
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Original-Reviewed-on: https://fuchsia-review.googlesource.com/c/fuchsia/+/908692
Original-Revision: a9e2a813892c7d33da87aa068dab63756177cad2
GitOrigin-RevId: b48aa57f31c9ac5be03b40e473795971f3b01539
Change-Id: I4d49da724796e63610e85c7229a055c5fb39bd7a