BaseTools: Skip directories with code extensions in the name

[xpahos]

Description

Currently openssl has an Open Quantum Safe provider submodule with directories like oqs-provider/oqs-template/oqsprov/oqsprov.c or oqs-provider/oqs-template/oqsprov/oqsprov/oqsprov_capabilities.c that are used as templates, but DebugMacroCheck tries to read them as a file when recursively traversing the subdirectories.

Fail message:

  File "/usr/lib/python3.10/pathlib.py", line 1119, in open
    return self._accessor.open(self, mode, buffering, encoding, errors,
  IsADirectoryError: [Errno 21] Is a directory: '/CryptoPkg/Library/OpensslLib/openssl/oqs-provider/oqs-template/oqsprov/oqsprov.c'

• Breaking change?
  • Breaking change - Does this PR cause a break in build or boot behavior?
  • Examples: Does it add a new library class or move a module to a different repo.
• Impacts security?
  • Security - Does this PR have a direct security impact?
  • Examples: Crypto algorithm change or buffer overflow fix.
• Includes tests?
  • Tests - Does this PR include any explicit test code?
  • Examples: Unit tests or integration tests.

How This Was Tested

git submodule update --init --recursive

stuart_ci_build -c .pytool/CISettings.py -v -p CryptoPkg,EmbeddedPkg,FatPkg,MdeModulePkg,MdePkg,NetworkPkg,PcAtChipsetPkg,SecurityPkg,ShellPkg,UefiCpuPkg,OvmfPkg -a $ARCH TOOL_CHAIN_TAG=$TOOL_CHAIN

Integration Instructions

N/A

[tianocore-assign-reviewers]

⚠ WARNING: Cannot add some reviewers: A user specified as a reviewer for this PR is not a collaborator of the repository. Please add them as a collaborator to the repository so they can be requested in the future.

Non-collaborators requested:

• @Javagedes

Attn Admins:

• @jljusten
• @ardbiesheuvel
• @lgao4
• @mdkinney
• @jkmathews
• @miki-intel-work

---

Admin Instructions:

• Add the non-collaborators as collaborators to the appropriate team(s) listed in teams
• If they are no longer needed as reviewers, remove them from Maintainers.txt