Improve connection pool failure diagnostics - #4590

build.proj(701,5): Error MSB3073: The command " "dotnet" test "D:\a\_work\1\s\src\..\src/Microsoft.Data.SqlClient/tests/UnitTests/Microsoft.Data.SqlClient.UnitTests.csproj" -p:Configuration=Debug --blame-hang --blame-hang-dump-type full --blame-hang-timeout 10m --filter "category=flaky" -f net8.0 -p:ReferenceType=Package -p:SqlClientPackageVersion=7.1.0-preview3-pr23727 -p:SqlServerPackageVersion=1.1.0-preview1-pr23727 --results-directory "TestResults" --logger:"trx;LogFilePrefix=SqlClientUnit-Windows_NT-net8.0" " exited with code 1.

Error: The process 'C:\hostedtoolcache\windows\dotnet\dotnet.exe' failed with exit code 1

Dotnet command failed with non-zero exit code on the following projects : [ 'D:\\a\\_work\\1\\s\\build.proj' ]