This reverts commit 397ddfee.

Reason for revert: The counter is actually used in benchmarks, e.g. https://ci.chromium.org/p/v8-internal/builders/ci/v8_linux64_perf/7593

Original change's description:
> [wasm] Remove V8.LiftoffCompileMicroSeconds counter
>
> The counter gets created but isn't used anywhere.
>
> R=​clemensb@chromium.org
>
> Bug: v8:10933
> Change-Id: I480e601f8118475a3ce750ba97fdae6780342d49
> Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2497166
> Reviewed-by: Clemens Backes <clemensb@chromium.org>
> Commit-Queue: Andreas Haas <ahaas@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#70756}

TBR=ahaas@chromium.org,clemensb@chromium.org

Change-Id: I15679baa338e317c54fafd98f547db006b276bae
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Bug: v8:10933
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2498696Reviewed-by: Andreas Haas <ahaas@chromium.org>
Commit-Queue: Andreas Haas <ahaas@chromium.org>
Cr-Commit-Position: refs/heads/master@{#70760}