Update the max TP threads count to sys.maxsize

[vrdmr]

Description

With new work being done on the Host side control concurrency, the 32 thread number isn't required. Setting the max value to MAXINT.

Fixes #873

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[AnatoliB]

I would even recommend removing the code performing this check, including the unit tests and comments, as this is effectively dead code now. But I'll leave this up to you. Other than that, LGTM and thank you!

[vrdmr]

@AnatoliB - Yes, that's the plan - to remove the code and the unit tests. I wanted to get this change in sooner to unblock the perf testing work and get this part of the next week's release.