* [Analysis] Allow calls to GlobalVar in @R.function
Prior to this commit, the post-parsing well-formed check performed by
TVMScript allowed a call to `GlobalVar` in a `@R.function`, but only
if it occurred within the context of a `@I.ir_module`. If
`@R.function` appeared on its own, calls to a `GlobalVar` would be
treated as calls to an undefined function.
* Use approrpirate well-formed checks TIR/Relax functions
* Lint fix
* Import order fix
Eric Lunderberg
72f0326a88