feat(opentelemetry-node): instrumentation-fastify

[david-luna]

Adds instrumentation of fastify module.

Closes: #40

[trentm]

Oh... test failure on 14.17.

[trentm]

Oh... test failure on 14.17.

     stack: |-
      Error: Command failed: /opt/hostedtoolcache/node/14.17.6/x64/bin/node ./fixtures/use-fastify.js
      internal/modules/cjs/loader.js:892
        throw err;
        ^
      
      Error: Cannot find module 'node:events'
      Require stack:
      - /home/runner/work/elastic-otel-node/elastic-otel-node/node_modules/avvio/boot.js
      - /home/runner/work/elastic-otel-node/elastic-otel-node/node_modules/fastify/fastify.js
      - /home/runner/work/elastic-otel-node/elastic-otel-node/packages/opentelemetry-node/test/fixtures/use-fastify.js
          at Function.Module._resolveFilename (internal/modules/cjs/loader.js:889:15)

And node: prefix was added in node v14.18.0 (https://nodejs.org/api/modules.html#core-modules).
It would be nice if fastify and other modules maintained an "engines" promise, but that's more work.

So I guess this needs to skip tests for <14.18.0