[improve][ci] Detect test thread leaks in CI builds and add tooling for resource leak investigation

[lhotari]

No description provided.

[codecov]

Codecov Report

Merging #153 (9b371f4) into master (f51e7ef) will increase coverage by 0.44%.
Report is 20 commits behind head on master.
The diff coverage is 76.26%.

Additional details and impacted files

@@             Coverage Diff              @@
##             master     #153      +/-   ##
============================================
+ Coverage     72.80%   73.25%   +0.44%     
- Complexity    32381    32580     +199     
============================================
  Files          1888     1890       +2     
  Lines        140298   140357      +59     
  Branches      15420    15425       +5     
============================================
+ Hits         102144   102818     +674     
+ Misses        30063    29446     -617     
- Partials       8091     8093       +2     

Flag	Coverage Δ
inttests	24.21% <38.88%> (?)
systests	24.72% <34.34%> (+0.05%)	⬆️
unittests	72.54% <76.26%> (+0.35%)	⬆️

Flags with carried forward coverage won't be shown. Click here to find out more.

Files	Coverage Δ
...authentication/AuthenticationDataSubscription.java	64.28% <100.00%> (+2.74%)	⬆️
...rization/MultiRolesTokenAuthorizationProvider.java	60.19% <100.00%> (+1.01%)	⬆️
...ache/pulsar/broker/resources/ClusterResources.java	73.80% <100.00%> (+3.14%)	⬆️
.../pulsar/broker/resources/LoadBalanceResources.java	100.00% <100.00%> (ø)
...pache/pulsar/broker/resources/PulsarResources.java	84.78% <100.00%> (ø)
...n/java/org/apache/pulsar/broker/PulsarService.java	82.81% <ø> (+0.23%)	⬆️
...pache/pulsar/broker/admin/impl/NamespacesBase.java	72.92% <100.00%> (+0.84%)	⬆️
.../org/apache/pulsar/broker/admin/v2/Namespaces.java	68.20% <ø> (-0.19%)	⬇️
.../pulsar/broker/service/AbstractBaseDispatcher.java	94.32% <100.00%> (+1.10%)	⬆️
...ava/org/apache/pulsar/broker/service/Consumer.java	86.23% <ø> (ø)
... and 34 more

... and 115 files with indirect coverage changes