fix: add _wrap function and support multiple Moderation responses

[estib]

What does this PR do?

Big Changes:

1. Instead of instrumenting each kind of API call in its own separate _instrument_*() function, adds a common _wrap() function that instruments each API call type listed in the new TO_WRAP dict. The hope is that this will make the code easier to maintain moving forward, since it makes "what does instrumentation mean" common across all the api calls, and it makes "what is getting instrumented" effectively just a series of configurations that can be tweaked and added to as necessary.
2. Changes the openai.Moderation.create() instrumentation to support multiple response values (and changes the underlying test expectations)

Small Changes:

1. doesn't import all of wrapt, just the wrap_function_wrapper that we need.
2. removes Tracer from opentelemetry.trace import, since we don't really need it?
3. swaps math.inf for the equivalent float('inf') so that we can drop the math import altogether.

Motivation

• Hopefully easier to review / maintain for future readers / contributors
• Support more uses of Moderation.create()

Testing

Tests pass locally, and the spans i captured in console matched my expectations.

[cartermp]

I dig the changes. Let's goooooo