Always attempt to upload mutation report

[martintmk]

The issue or feature being addressed

We have seen mutants that were not killed in some builds. Because the mutation report was not uploaded, we couldn't determine the cause. With this change, we always try to upload the mutation reports.

Confirm the following

• I started this PR by branching from the head of the default branch
• I have targeted the PR to merge into the default branch
• I have included unit tests for the issue/feature
• I have successfully run a local build

[codecov-commenter]

Codecov Report

Merging #1078 (38b4923) into main (36ceee0) will not change coverage.
The diff coverage is n/a.

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@@           Coverage Diff           @@
##             main    #1078   +/-   ##
=======================================
  Coverage   73.83%   73.83%           
=======================================
  Files         161      161           
  Lines        4086     4086           
  Branches      775      775           
=======================================
  Hits         3017     3017           
  Misses        864      864           
  Partials      205      205           

Flag	Coverage Δ
linux	73.83% <ø> (?)
macos	?
windows	?

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