[BUG]: VSTest@3 TestPlan testSelector: not retrieving all test cases from the test suite

[acostmig]

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Task name

VSTest

Task version

3

Issue Description

I've found a special case that when having 200+ test cases in a given test suite and the test configuration is mixed, the VSTest@3 task is only pulling up to the 201th test and leaving the rest out

Environment type (Please select at least one enviroment where you face this issue)

• Self-Hosted
• Microsoft Hosted
• VMSS Pool
• Container

Azure DevOps Server type

dev.azure.com (formerly visualstudio.com)

Azure DevOps Server Version (if applicable)

No response

Operation system

Windows

Relevant log output

no error message

Full task logs with system.debug enabled

 [REPLACE THIS WITH YOUR INFORMATION] 

Repro steps

1. Create 2 test suites both of 300 test cases
2. let Test Suite 1 have 1 default configuration (assign to the test suite)
3. let Test Suite 2 have 1 default configuration (assign to the test suite)
4.  pick a handful of test cases to add a **different** configuration under Test Suite 2
     use order for this, lets say 
     Test Point (Test Case) of order 1
     Test Point (Test Case) of order 100
     Test Point (Test Case) of order 200
     Test Point (Test Case) of order 201
     Test Point (Test Case) of order 202
     Test Point (Test Case) of order 299
5. Use VSTask@3 to run the above
6. First run, run Test Suite 1 with the default configuration, all 300 will be executed here
7. Second run, run Test Suite 2 with **different** configuration

Expected: Second run with **different** configuration should run all 6 test cases
Actual: Second run with **different** configuration is only running the first 4 test cases on this configuration