Allow none for --hangdump-type

[Youssef1313]

Fixes #6776

[nohwnd]

testfx/src/Platform/Microsoft.Testing.Extensions.HangDump/Resources/ExtensionResources.resx

Lines 189 to 197 in ebcfad4

	<data name="HangDumpTypeOptionDescription" xml:space="preserve">
	<value>Specify the type of the dump.
	Valid values are 'Mini', 'Heap', 'Triage' (only available in .NET 6+) or 'Full'.
	Default type is 'Full'</value>
	</data>
	<data name="HangDumpTypeOptionInvalidType" xml:space="preserve">
	<value>'{0}' is not a valid dump type.
	Valid options are 'Mini', 'Heap', 'Triage' (only available in .NET 6+) and 'Full'</value>
	</data>

Additional resources mentioning the names for help .