Narrow the exports for noir_js

[signorecello]

Problem

As part of #3044 we decided to initially export everything from noirc_abi and acvm_js in order to keep the benefits of versioning.

However we should see which methods are needed to be exported, to avoid simply re-exporting the import, as discussed in that thread

Happy Case

NoirJS would only export methods that are used elsewhere, like acvm's generateWitness, so we keep some control over what's given to the Noir app developer.

Alternatives Considered

See #3044 for alternatives and their discussions

Additional Context

No response

Would you like to submit a PR for this Issue?

No

Support Needs

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