Improve GraphQL instrumentation and fix platform mismatch error

Fixed

• Fix a misleading platform mismatch error when the AppSignal extension fails to load on musl-based systems.

Changed

• Improve the behaviour of the GraphQL instrumentation, so that it creates less redundant spans for similar items in a list, and less trivial spans for attribute resolutions.

See the Node.js package 3.0.21 changelog for more information.