disable test of runner using distributed

[basnijholt]

Description

It seems to fail a lot on Windows, making the whole pipeline fail.

Checklist

• Fixed style issues using pre-commit run --all (first install using pip install pre-commit)
• pytest passed

Type of change

Check relevant option(s).

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• This change requires a documentation update

[codecov-io]

Codecov Report

Merging #253 into master will not change coverage.
The diff coverage is 100%.

@@ Coverage Diff @@## master #253 +/- ##
=======================================
Coverage 79.48% 79.48% =======================================
Files 32 32 Lines 4402 4402 Branches 809 809 =======================================
Hits 3499 3499 Misses 777 777 Partials 126 126

Impacted Files	Coverage Δ
adaptive/tests/test_runner.py	94.11% <100%> (ø)	⬆️

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