fix(types): add typing for build.stats options

[danielroe]

Types of changes

• Bug fix (a non-breaking change which fixes an issue)

Description

resolves #9552

Checklist:

• All new and existing tests are passing.

[codecov-commenter]

Codecov Report

Merging #9555 (6edc484) into dev (a3b2fd8) will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##              dev    #9555   +/-   ##
=======================================
  Coverage   65.15%   65.15%           
=======================================
  Files          94       94           
  Lines        4107     4107           
  Branches     1126     1126           
=======================================
  Hits         2676     2676           
  Misses       1152     1152           
  Partials      279      279           

Flag	Coverage Δ
unittests	65.15% <ø> (ø)

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