ref(inbound-filters) Remove unused inbound filter health-check feature

[RaduW]

This PR removes the health-check feature for inbound filters since it is no longer used

fixes: #51698

[codecov]

Codecov Report

Merging #52099 (c336f1d) into master (1653ff8) will increase coverage by 2.15%.
The diff coverage is 75.00%.

Additional details and impacted files

@@            Coverage Diff             @@
##           master   #52099      +/-   ##
==========================================
+ Coverage   77.16%   79.32%   +2.15%     
==========================================
  Files        4901     4901              
  Lines      205077   205146      +69     
  Branches    35055    35072      +17     
==========================================
+ Hits       158242   162722    +4480     
+ Misses      41937    37460    -4477     
- Partials     4898     4964      +66     

Impacted Files	Coverage Δ
src/sentry/api/endpoints/project_filter_details.py	71.42% <0.00%> (-3.58%)	⬇️
src/sentry/conf/server.py	91.84% <ø> (+0.01%)	⬆️
src/sentry/features/__init__.py	100.00% <ø> (ø)
src/sentry/ingest/inbound_filters.py	77.41% <80.00%> (-0.71%)	⬇️
src/sentry/api/endpoints/project_filters.py	100.00% <100.00%> (ø)
src/sentry/relay/config/__init__.py	92.56% <100.00%> (+17.84%)	⬆️

... and 300 files with indirect coverage changes