Update RemoteExecutor

[antonfirsov]

Prerequisites

• I have written a descriptive pull-request title
• I have verified that there are no overlapping pull-requests open
• I have verified that I am following the existing coding patterns and practice as demonstrated in the repository. These follow strict Stylecop rules 👮.
• I have provided test coverage for my change (where applicable)

Description

Since dotnet/arcade#7443 and dotnet/arcade#7426 got merged, we just need to update RemoteExecutor to fix #1376.

Update: Looks like dotnet/arcade#7426 doesn't work with the legacy xunit console host we use for running 32 bit tests on .NET Framework, disabled the test for that case, will open an issue for the gap.

WIP:

• Add a test for false positives (curious about current CI results)
• Update RemoteExecutor version
• Fix test failures

[codecov]

Codecov Report

Merging #1659 (255802c) into master (381dff8) will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master    #1659   +/-   ##
=======================================
  Coverage   84.27%   84.27%           
=======================================
  Files         816      816           
  Lines       35827    35827           
  Branches     4159     4159           
=======================================
  Hits        30193    30193           
  Misses       4819     4819           
  Partials      815      815           

Flag	Coverage Δ
unittests	84.27% <ø> (ø)

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[JimBobSquarePants]

LGTM