Remove unused workflow action

Bump the tests group with 2 updates

Bumps Microsoft.NET.Test.Sdk from 17.13.0 to 17.14.1
Bumps xunit.runner.visualstudio from 3.0.2 to 3.1.5

---
updated-dependencies:
- dependency-name: Microsoft.NET.Test.Sdk
  dependency-version: 17.14.1
  dependency-type: direct:production
  update-type: version-update:semver-minor
  dependency-group: tests
- dependency-name: xunit.runner.visualstudio
  dependency-version: 3.1.5
  dependency-type: direct:production
  update-type: version-update:semver-minor
  dependency-group: tests
...

Signed-off-by: dependabot[bot] <[email protected]>

Allow running on latest & greatest installed

This should allow it to run on .net9 only (and future versions too).

Fixes #87

⬆️ Bump files with dotnet-file sync

# devlooped/dotnet-trx

- Add mention to @devlooped for visibility devlooped/dotnet-trx@cf6a9a0

Include messages to standard error, this to make the log complete

Showcase that we can run/render 1k+ tests

Related to #47

Make retry logic more resilient to changes in xunit/vstest output

There was a significant change in output from dotnet test/vstest/xunit which caused us to bail too early and not retry properly.

We know the output (for now?) will contain the phrasing `Results file: {path}\{filename}.trx`, but we don't want to make that detection too fragile either. So we just check for the presence of the directory we pass as results dir, which should be always available in standard output.

Fixes #48

Revert help.md change to the one that works

Simulate real test work with a random delay

⬆️ Bump files with dotnet-file sync

# devlooped/dotnet-trx

- Fix whitespace in elapsed time badge devlooped/dotnet-trx@b3022d2