fix: redis instrumentation loses context when using callbacks

[aspectom]

Which problem is this PR solving?

• When using redis instrumentation with callbacks instead of async await, original span context is lost.

Short description of the changes

• Call context.with when calling original callback

[dyladan]

You can also just do return context.with(originalContext, originalCallback, callbackThis, ...arguments) https://open-telemetry.github.io/opentelemetry-js-api/classes/contextapi.html#with

[dyladan]

This way you avoid creating an additional function call

[aspectom]

Wasn't aware of that one. thanks @dyladan , fixed :)

[codecov]

Codecov Report

Merging #580 (f4b627b) into main (a63b828) will increase coverage by 0.00%.
The diff coverage is n/a.

❗ Current head f4b627b differs from pull request most recent head 52e90d9. Consider uploading reports for the commit 52e90d9 to get more accurate results

@@           Coverage Diff           @@
##             main     #580   +/-   ##
=======================================
  Coverage   94.94%   94.94%           
=======================================
  Files         195      195           
  Lines       11630    11637    +7     
  Branches     1115     1115           
=======================================
+ Hits        11042    11049    +7     
  Misses        588      588           

Impacted Files	Coverage Δ
...e/opentelemetry-instrumentation-redis/src/utils.ts	92.98% <0.00%> (+0.12%)	⬆️
...telemetry-instrumentation-redis/test/redis.test.ts	95.65% <0.00%> (+0.14%)	⬆️