Fix uniquifyName failure when compiling with debug flag

[jabraham17]

Fixes an issue where we were erroneously throwing an internal error when calling uniquifyName when --debug-safe-optimizations-only was passed.

I narrowed this down to being caused by --no-copy-propagation --no-dead-code-elimination leaving behind multiple extern declarations with the same name in a single function. This failure is caused by the compiler leaving extra temporaries behind, but the bug is actually just #9299, so I just fixed #9299.

I also found a failure when using remove-empty-records by itself, which I fixed in this PR.

Resolves #28165
Resolves #9299

• paratest with/without gasnet
• confirmed small reproducer passes with this change
• confirmed that original reproducer in Arkouda with COMM=gasnet and --debug-safe-optimizations-only now compiles
  • this is only partially true. Arkouda now hits a different compiler error which will be resolved in a later PR

[Reviewed by @benharsh]