Port ddc626e1

Original commit message:
    I64Shl is lowered to a new turbofan operator, WasmWord64Shl. The new
    operator takes 3 inputs, the low-word input, the high-word input, and
    the shift, and produces 2 output, the low-word output and the high-word
    output.

R=ahaas@chromium.org, joransiu@ca.ibm.com, jyan@ca.ibm.com, michael_dawson@ca.ibm.com
BUG=

Review URL: https://codereview.chromium.org/1765383004

Cr-Commit-Position: refs/heads/master@{#34588}