Add option to opt-out of Node "Not instrumented" warnings

[mydea]

Description

Today, in certain cases Node SDK users will see warnings about a framework not being instrumented. In most cases, this is helpful because it tells you something will not work as expected, and thus it is good to let users know that something is bad.

However, there are also legimitate reasons for this. For example: #12056 (comment) if you have a version of a framework that is not (yet) supported by OTEL, like using express 5 beta.

For such cases, we should offer a way to silence these warnings, at least.