feat: mysql support

[dyladan]

Which problem is this PR solving?

• Request(plugin): mysql #489 mysql support

This is a draft PR so that people can take a look and give feedback. It is not ready for merge and has not been sufficiently tested. There is an example at examples/mysql where you can see a working example.

Basic description of changes

• Instrument connections created with createConnection
  • Callback responses
  • Streaming responses
• Instrument connection pools created with createPool
  • Callback responses
  • Streaming responses
• Cluster pool instrumentation
• tests

edit: prepared statements not supported by mysql package

[codecov-io]

Codecov Report

Merging #525 into master will increase coverage by 2.19%.
The diff coverage is 94.84%.

@@            Coverage Diff             @@
##           master     #525      +/-   ##
==========================================
+ Coverage   90.25%   92.44%   +2.19%     
==========================================
  Files         148      157       +9     
  Lines        7448     7958     +510     
  Branches      668      689      +21     
==========================================
+ Hits         6722     7357     +635     
+ Misses        726      601     -125

Impacted Files	Coverage Δ
packages/opentelemetry-node/src/config.ts	100% <ø> (ø)
packages/opentelemetry-plugin-mysql/src/enums.ts	100% <100%> (ø)
...kages/opentelemetry-plugin-mysql/test/testUtils.ts	15.78% <15.78%> (ø)
packages/opentelemetry-plugin-mysql/src/utils.ts	95.45% <95.45%> (ø)
packages/opentelemetry-plugin-mysql/src/mysql.ts	95.79% <95.79%> (ø)
...ages/opentelemetry-plugin-mysql/test/mysql.test.ts	98.2% <98.2%> (ø)
...kages/opentelemetry-plugin-dns/test/utils/utils.ts	33.33% <0%> (-26.67%)	⬇️
...es/opentelemetry-node/src/instrumentation/utils.ts	90.47% <0%> (-9.53%)	⬇️
...ges/opentelemetry-tracing/src/NoopSpanProcessor.ts	66.66% <0%> (-8.34%)	⬇️
.../opentelemetry-plugin-redis/test/assertionUtils.ts	95.83% <0%> (-4.17%)	⬇️
... and 46 more

[dyladan]

@open-telemetry/javascript-approvers this is ready for reviews. pls take a look

[vmarchaud]

Except the @ts-ignore that i would prefer to remove, lgtm

[vmarchaud]

LGTM now ;)

[markwolff]

LGTM

[mayurkale22]

👍

[dyladan]

@mayurkale22 should I add mysql to the default plugins list in this PR or should I wait until this is merged and do a separate PR?

[mayurkale22]

@mayurkale22 should I add mysql to the default plugins list in this PR or should I wait until this is merged and do a separate PR?

I am fine with either way. In the future, maybe will update the default plugins list once the plugin looks stable after 1-2 release. WDYT?