Update GetFunctionNumArgs API for template functions

[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 78.82%. Comparing base (32efeba) to head (cac4731).

Additional details and impacted files

[](https://app.codecov.io/gh/compiler-research/CppInterOp/pull/219?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=compiler-research) ```diff @@ Coverage Diff @@ ## main #219 +/- ## ========================================== + Coverage 78.80% 78.82% +0.01% ========================================== Files 8 8 Lines 3100 3102 +2 ========================================== + Hits 2443 2445 +2 Misses 657 657 ``` | [Files](https://app.codecov.io/gh/compiler-research/CppInterOp/pull/219?dropdown=coverage&src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=compiler-research) | Coverage Δ | | |---|---|---| | [lib/Interpreter/CppInterOp.cpp](https://app.codecov.io/gh/compiler-research/CppInterOp/pull/219?src=pr&el=tree&filepath=lib%2FInterpreter%2FCppInterOp.cpp&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=compiler-research#diff-bGliL0ludGVycHJldGVyL0NwcEludGVyT3AuY3Bw) | `86.44% <100.00%> (+0.01%)` | :arrow_up: | | [Files](https://app.codecov.io/gh/compiler-research/CppInterOp/pull/219?dropdown=coverage&src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=compiler-research) | Coverage Δ | | |---|---|---| | [lib/Interpreter/CppInterOp.cpp](https://app.codecov.io/gh/compiler-research/CppInterOp/pull/219?src=pr&el=tree&filepath=lib%2FInterpreter%2FCppInterOp.cpp&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=compiler-research#diff-bGliL0ludGVycHJldGVyL0NwcEludGVyT3AuY3Bw) | `86.44% <100.00%> (+0.01%)` | :arrow_up: |