Adds implementations and tests for the following bytecodes:
  - LdaZero
  - LdaSmi8
  - LdaUndefined
  - LdaNull
  - LdaTheHole
  - LdaTrue
  - LdaFalse
  - LdaLdar
  - LdaStar

Also adds  Smi tagging / untagging and OperandType typed
BytecodeOperand operations to InterpreterAssembler.

BUG=v8:4280
LOG=N

Review URL: https://codereview.chromium.org/1294793002

Cr-Commit-Position: refs/heads/master@{#30226}