Change the CompilationInfo::IsCodePreAgingActive() predicate to CompilationInfo::GeneratePreagingPrologue() and handle the case of WASM functions, which should not be aged.

R=mstarzinger@chromium.org
BUG=

Review URL: https://codereview.chromium.org/1577193003

Cr-Commit-Position: refs/heads/master@{#33232}