Non-source files are passed to compilers

[johnbrvc]

Describe the issue:
If a contestant makes a submission with a main file and extra files, a Compile Error (CE) may incorrectly result. This was observed during the Greater NY Regional 2024

To Reproduce:
Make a submission with a main file of prog.py and add additional .txt files as well.
A CE will result, even if prog.py is a valid Python program

Expected behavior:
PC2 should not issue a compile error if the main file compiles correctly and non-source files are passed in the submission.

Actual behavior:
PC2 passes ALL files it receives to the compiler, including non-sources files. According to the ICPC Programming Environment notes (circa 2024), it says:

Files with the following suffixes (and only files with these suffixes) will be submitted to the compiler:

For C submissions: files ending with .c
For C++ submissions: files ending with .cc, .cpp, .cxx, or .c++
For Java submissions: files ending with .java
For Python submissions: files ending with .py
For Kotlin submissions: files ending with .kt

Environment:
All.

Log Info:

241110 191740.975|DEBUG|Thread-5|log|after  substitution: /usr/bin/pypy3 -m py_compile m.py mhelp.txt mLeftShift.txt mRightShift.txt
241110 191740.975|INFO|Thread-5|log|entering runProgram() to execute command '/usr/bin/pypy3 -m py_compile m.py mhelp.txt mLeftShift.txt mRightShift.txt'

Screenshots:

Additional context: