Reorder PK of boilers_eia860 to group data like other tables

[zaneselvans]

PR Overview

By default the data is ordered by primary key in the DB, and the current ordering means that all boilers with the same boiler ID are grouped together, rather than all boilers within a given plant being grouped together, as is the case with generator ID. I think it's more likely that folks would like to see all the boilers that are part of a given plant, than all plants that happen to have a boiler with ID "A1". Check out boilers_eia860 on our Datasette to see what it looks like now.

PR Checklist

• Merge the most recent version of the branch you are merging into (probably dev).
• All CI checks are passing. Run tests locally to debug failures

[codecov]

Codecov Report

Patch and project coverage have no change.

Comparison is base (c7568f7) 86.1% compared to head (33455ad) 86.1%.

Additional details and impacted files

@@          Coverage Diff          @@
##             dev   #2375   +/-   ##
=====================================
  Coverage   86.1%   86.1%           
=====================================
  Files         74      74           
  Lines       9376    9376           
=====================================
  Hits        8082    8082           
  Misses      1294    1294           

Impacted Files	Coverage Δ
src/pudl/metadata/resources/eia860.py	100.0% <ø> (ø)

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[e-belfer]

Works as expected, good to go!