Re-evaluate RITM externalisation

[wpessers]

Is your feature request related to a problem? Please describe. This issue is mainly for tracking. In https://github.com/open-telemetry/opentelemetry-lambda/pull/2037 we externalised the require-in-the-middle lib from our webpack bundle for the node.js layer, to fix an issue that broke instrumentation that relied on ritm hooking for non-core modules.

Describe the solution you'd like Fixing upstream would be ideal, so that we can include RITM in our bundle again. In https://github.com/nodejs/require-in-the-middle/issues/120 I offered some insight as well and proposed a solution that could possibly be implemented in the RITM lib.

Describe alternatives you've considered Keeping RITM externalised.

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