PPC/s390: Reland of [interpreter] Add explicit OSR polling bytecode. (patchset #1 id:1 of https://codereview.chromium.org/2184553003/ )

Port e1ad114e

Original commit message:

    Reason for revert:
    Fix has been landed.

    Original issue's description:
    > Revert of [interpreter] Add explicit OSR polling bytecode. (patchset #6 id:100001 of https://codereview.chromium.org/2172233002/ )
    >
    > Reason for revert:
    > Bunch of breakages. Maybe bad interaction with https://chromium.googlesource.com/v8/v8/+/e520e5da5550f0d1a975e87d6e66a2edecbb0c8e ?
    >
    > E.g.:
    > https://build.chromium.org/p/client.v8/builders/V8%20Linux64/builds/11607
    >
    > Original issue's description:
    > > [interpreter] Add explicit OSR polling bytecode.
    > >
    > > This adds an explicit {OsrPoll} bytecode into every loop header which
    > > triggers on-stack replacement when armed. Note that each such bytecode
    > > stores the static loop depths as an operand, and hence can be armed for
    > > specific loop depths.
    > >
    > > This also adds builtin code that triggers OSR compilation and switches
    > > execution over to optimized code in case compilation succeeds. In case
    > > compilation fails, the bytecode dispatch just continues unhindered.
    > >
    > > R=rmcilroy@chromium.org
    > > TEST=mjsunit/ignition/osr-from-bytecode
    > > BUG=v8:4764
    > >
    > > Committed: https://crrev.com/a55beb68e0ededb3773affa294a71edc50621458
    > > Cr-Commit-Position: refs/heads/master@{#38043}
    >
    > TBR=rmcilroy@chromium.org,mstarzinger@chromium.org
    > # Skipping CQ checks because original CL landed less than 1 days ago.
    > NOPRESUBMIT=true
    > NOTREECHECKS=true
    > NOTRY=true
    > BUG=v8:4764
    >
    > Committed: https://crrev.com/439aa2c6d708bfd95db725bd6f97c4c49bbc51fc
    > Cr-Commit-Position: refs/heads/master@{#38044}

R=mstarzinger@chromium.org, joransiu@ca.ibm.com, jyan@ca.ibm.com, michael_dawson@ca.ibm.com, mbrandy@us.ibm.com

BUG=v8:4764
LOG=N

Review-Url: https://codereview.chromium.org/2182173002
Cr-Commit-Position: refs/heads/master@{#38063}