[Interpreter] Print constant pool in generate-bytecode-expectations
This is a follow-up to https://crrev.com/1671863002, adding the capability to print the contents of the constant pool. The expected type of the pool is taken from command line, and it's either: * string/int/double: assume all constants have the specified type. This way, we can emit a meaningful representation, e.g. a quoted string for type string and so on. All the constants in the pool must have the same type, otherwise one or more CHECK() will fail and the program will eventually crash. * mixed: print the InstanceType tag instead of the actual value. This is the choice for those tests where the type of the constants in the pool is not uniform, however only a type tag is printed, not the actual value of the entries. SMIs are an exception, since they do not have an InstanceType tag, so kInstanceTypeDontCare is printed instead. In addition to that, functions Print{ExpectedSnippet,BytecodeSequence} have been extracted with no functional change. It's just for improving readability, since the code is becoming quite long. BUG=v8:4280 LOG=N Review URL: https://codereview.chromium.org/1686963002 Cr-Commit-Position: refs/heads/master@{#33888}
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