🐛Autoscaling: Buffer pools metrics always showing 0

[sanderegg]

What do these changes do?

The metrics values for the autoscaling EBS buffers were always showing 0.

This PR fixes this issue as the Gauge used were overriden due to multiple instance types. Using a flat list fixes this.

related dashboard:

Related issue/s

How to test

Dev-ops checklist

• No ENV changes or I properly updated ENV (read the instruction)

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 66.6%. Comparing base (cafbf96) to head (826707d).
Report is 510 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff            @@
##           master   #6314      +/-   ##
=========================================
- Coverage    84.5%   66.6%   -18.0%     
=========================================
  Files          10     626     +616     
  Lines         214   32163   +31949     
  Branches       25     260     +235     
=========================================
+ Hits          181   21438   +21257     
- Misses         23   10665   +10642     
- Partials       10      60      +50     

Flag	Coverage Δ
integrationtests	64.6% <ø> (?)
unittests	96.3% <100.0%> (+11.7%)	⬆️

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

Files with missing lines	Coverage Δ
...oscaling/src/simcore_service_autoscaling/models.py	100.0% <100.0%> (ø)
...ice_autoscaling/modules/instrumentation/_models.py	100.0% <100.0%> (ø)

... and 634 files with indirect coverage changes

[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarCloud