Add global internal param to get default datapath worker pool #2880

Job	Run time
Ubuntu (linux, ubuntu-20.04, x64, openssl) / Build	2m 52s
Ubuntu (linux, ubuntu-22.04, x64, openssl3) / Build	2m 55s
Ubuntu (linux, ubuntu-24.04, x64, openssl3, -UseXdp) / Build	2m 56s
Windows (windows, windows-2022, x64, openssl3) / Build	4m 55s
Windows (windows, windows-2022, x64, openssl) / Build	4m 9s
Build All Darwin Frameworks / Build Darwin Binaries (ios, arm64) / Build	3m 3s
Build All Darwin Frameworks / Build Darwin Binaries (ios, x64) / Build	2m 27s
Build All Darwin Frameworks / Build Darwin Binaries (macos, arm64) / Build	3m 31s
Build All Darwin Frameworks / Build Darwin Binaries (macos, x64) / Build	2m 51s
Build All Darwin Frameworks / Build Universal Binaries	47s
Build All Darwin Frameworks / Build Darwin Framework (ios, x64)	22s
Build All Darwin Frameworks / Build Darwin Framework (ios, arm64)	39s
Build All Darwin Frameworks / Build Darwin Framework (macos, universal)	30s
Build All Darwin Frameworks / Build Darwin XCFramework	30s
DotNet Test (windows, windows-2022, x64, openssl)	56s
DotNet Test (windows, windows-2022, x64, openssl3)	1m 43s
DotNet Test (linux, ubuntu-20.04, x64, openssl)	1m 16s
DotNet Test (linux, ubuntu-22.04, x64, openssl3)	1m 12s
DotNet Test (linux, ubuntu-24.04, x64, openssl3, -UseXdp)	1m 32s
DotNet Test (macos, macos-12, universal, openssl)	31s
	39m 37s

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