feat: add goleak check

[inosmeet]

Which problem is this PR solving?

• Partial Fix for: Enable and enforce goroutine leak checks in tests #5006

Description of the changes

• Added goleak check in ./plugin/storage/integration/ directory.

How was this change tested?

• make lint make test

Checklist

• I have read https://github.com/jaegertracing/jaeger/blob/master/CONTRIBUTING_GUIDELINES.md
• I have signed all commits
• I have added unit tests for the new functionality
• I have run lint and test steps successfully
  • for jaeger: make lint test
  • for jaeger-ui: yarn lint and yarn test

[inosmeet]

lint-goleak now passes for all packages.
cc @yurishkuro

[inosmeet]

These tests are failing due to unexpected goroutines found by Goleak. After looking into it for a while, I’m unsure how to move forward. Can you nudge me in the right direction?? @yurishkuro

[yurishkuro]

See #5468 (comment)

[yurishkuro]

closing for now, feel free to re-open once you have the actual fixes