Updated FilterScheduler for performance

[DanteNiewenhuis]

Summary

Updated the FilterScheduler to reduce redundant operations.

Implementation Notes ⚒️

The old implementation of FilterScheduler took all Hosts, filtered them, and sorted them.
However, in most cases only a few different types of hosts are actually used by a data center.
This means we can check only one of the hosts of each type instead of testing them all.

External Dependencies 🍀

N / A

Breaking API Changes ⚠️

N / A

Simply specify none (N/A) if not applicable.

[codecov]

Codecov Report

❌ Patch coverage is 75.60976% with 10 lines in your changes missing coverage. Please review.
✅ Project coverage is 57.41%. Comparing base (e84bb56) to head (a2d120a).
⚠️ Report is 1 commits behind head on master.

Files with missing lines	Patch %	Lines
...ndc/compute/simulator/scheduler/FilterScheduler.kt	73.07%	3 Missing and 4 partials ⚠️
...mulator/scheduler/timeshift/MemorizingTimeshift.kt	0.00%	1 Missing ⚠️
...imulator/scheduler/timeshift/TimeshiftScheduler.kt	0.00%	1 Missing ⚠️
.../main/kotlin/org/opendc/web/runner/OpenDCRunner.kt	0.00%	1 Missing ⚠️

Additional details and impacted files

@@             Coverage Diff              @@
##             master     #371      +/-   ##
============================================
+ Coverage     57.36%   57.41%   +0.04%     
  Complexity        1        1              
============================================
  Files           335      335              
  Lines         10980    11013      +33     
  Branches       1021     1030       +9     
============================================
+ Hits           6299     6323      +24     
- Misses         4329     4334       +5     
- Partials        352      356       +4     

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