Fix IDE warnings and remove usage of several deprecated fields.

[willbeason]

Why the changes in this PR are needed?

Reducing the reliance on deprecated functions makes it easier to delete them later. Fixing these warnings reduces IDE clutter as IDEs highlight these and show them in code reports, increasing noise that might help devs identify issues that could actually represent problems.

What are the changes in this PR?

• Replaced instances of deprecated .Path() with equivalent .Ref().GroundPrefix()
• Replaced instances of deprecated .Args() with equivalent .FuncArgs().Args
• Renamed variables to not collide with reserved words or imported packages

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[ashutosh-narkar]

Thanks for the contribution @willbeason! LGTM. Only thing I'm not sure about is if Path() should be replaced by Ref() and not Ref().GroundPrefix(). cc @johanfylling

[willbeason]

Yeah, the replace looks weird. It is equivalent (at least, according to tests), but it doesn't look good.

[johanfylling]

LGTM 👍

I believe all instances of .Path() that's been replaced here do expect the ground prefix; so the change is good 👍 .