Support generating histogram bucket boundaries option from weaver.yaml

[dashpole]

Problem Statement

Instead of hard-coding bucket boundary options in instrumentation code like open-telemetry/opentelemetry-go-contrib#8642, do it in the generated code to make it cleaner.

Proposed Solution

Similar to how we choose between observable and synchronous instruments, we could list all of the custom bucket boundaries in https://github.com/open-telemetry/opentelemetry-go/blob/main/semconv/templates/registry/go/weaver.yaml, and generate the option. For example, we have the same bucket boundaries provided for a bunch of http instrumentation libraries.

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