refactor: Update nock version and migrate broken tests

[sergioregueira]

Which problem is this PR solving?

This pull request closes issue #1303.

Short description of the changes

1. Move nock from dependencies to devDependencies in @opentelemetry/sdk-node (it is a test dependency).
2. Update nock version from 12.0.3 to 13.0.4 (latest version) in 9 packages.
3. Migrate tests following Migration guide:
   1. Replace nock.Interceptor.socketDelay() with nock.Interceptor.delayConnection().
   2. nock no longer emits a socket hang up error on request abort and it closes connection inmediately after writing the response, so I had to replace a nock with a manual mock (built with http.createServer [1]) to simulate aborted event.

[1] A server was already running on serverPort because of previous tests (See http-enable.test.ts > HttpPlugin > enable > with good plugin options > before), so I chose to start a new server instead of rewriting all the previous tests.

[codecov]

Codecov Report

Merging #1504 into master will increase coverage by 0.02%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master    #1504      +/-   ##
==========================================
+ Coverage   93.82%   93.84%   +0.02%     
==========================================
  Files         154      154              
  Lines        4762     4762              
  Branches      951      951              
==========================================
+ Hits         4468     4469       +1     
+ Misses        294      293       -1     

Impacted Files	Coverage Δ
packages/opentelemetry-plugin-http/src/http.ts	98.42% <0.00%> (+0.52%)	⬆️

[obecny]

@sergioregueira build is failing, seems like valid failure, please have a look

[pichlermarc]

Closing this as it has been fixed by #2652 🙂