Add goleak check to packages with empty tests

[yurishkuro]

Which problem is this PR solving?

• Part of Enable and enforce goroutine leak checks in tests #5006

Description of the changes

• Add goleak checks to all packages with empty_test.go as well as ./storage/... (which mostly contains APIs)

How was this change tested?

• CI

[yurishkuro]

cc @akagami-harsh

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (4113075) 52.64% compared to head (2402b4b) 95.62%.

Additional details and impacted files

@@             Coverage Diff             @@
##             main    #5017       +/-   ##
===========================================
+ Coverage   52.64%   95.62%   +42.98%     
===========================================
  Files         145      319      +174     
  Lines        8593    18786    +10193     
===========================================
+ Hits         4524    17965    +13441     
+ Misses       3721      659     -3062     
+ Partials      348      162      -186     

Flag	Coverage Δ
cassandra-3.x	25.63% <ø> (ø)
cassandra-4.x	25.63% <ø> (ø)
elasticsearch-5.x	19.89% <ø> (ø)
elasticsearch-6.x	19.89% <ø> (-0.02%)	⬇️
elasticsearch-7.x	20.04% <ø> (ø)
elasticsearch-8.x	20.13% <ø> (ø)
grpc-badger	19.52% <ø> (ø)
kafka	14.12% <ø> (ø)
opensearch-1.x	20.02% <ø> (ø)
opensearch-2.x	20.02% <ø> (-0.02%)	⬇️
unittests	93.37% <ø> (?)

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[jkowall]

lgtm! Thanks.