Preprocessor usage can be reduced in pxr/base/tf

[nvmkuruc]

Description of Issue

Both pxr/base/tf/enum.h and pxr/base/tf/scopeDescription.h provide macros which use the boost preprocessor.

The enum.h usage can be removed in favor of always passing a string since the default argument is an empty string.
The scopeDescription.h usage can be removed in favor of variadic templates. Specific forwarding overloads can be provided to avoid unnecessarily creating new strings if no formatting is needed.

Steps to Reproduce

N/A

System Information (OS, Hardware)

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Package Versions

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Build Flags

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[nvmkuruc]

I have a fix.

[tallytalwar]

Filed as internal issue #USD-8066

[nvmkuruc]

This was addressed by #2320. Closing.