Fix --enable-pqc build with --disable-wolfcrypt

[dgarske]

./configure --enable-pqc --enable-spi --disable-wolfcrypt && make failed to build: wc_ForceZero was declared only inside the wolfCrypt branch of tpm2_types.h, and tests/unit_tests.c included wc_mldsa.h gated only on WOLFTPM_MLDSA_SIGN, so wolfCrypt's BAD_MUTEX_E enumerator collided with wolfTPM's macro of the same name. Adds a wc_ForceZero fallback for the no-wolfCrypt branch, guards the include, stops configure from probing a wolfSSL this mode never links, and adds a standalone-pqc CI job that builds the examples and unit tests (every existing PQC row uses --disable-examples, which is why this escaped).

Fixes:

./configure --enable-pqc --enable-spi --disable-wolfcrypt && make
...
examples/pqc/pqc_mssim_e2e.c: In function ‘test_mlkem_roundtrip’:
examples/pqc/pqc_mssim_e2e.c:131:5: error: implicit declaration of function ‘wc_ForceZero’; did you mean ‘TPM2_ForceZero’? [-Werror=implicit-function-declaration]
  131 |     wc_ForceZero(ss1, sizeof(ss1));
      |     ^~~~~~~~~~~~
      |     TPM2_ForceZero

[tomoveu]

Nice quick fix.

[Copilot]

🟡 Changes recommended

The fallback may fail to compile because size_t is not guaranteed to be defined.

Once you've addressed the issues Copilot identified, you can request another Copilot review.

Pull request overview

Fixes standalone PQC builds when wolfCrypt is disabled and adds CI coverage.

Changes:

• Adds a no-wolfCrypt wc_ForceZero fallback.
• Guards wolfSSL-specific includes and configure probes.
• Adds standalone PQC build jobs.

File summaries

File	Summary
wolftpm/tpm2_types.h	Adds the fallback; currently lacks a guaranteed size_t definition.
tests/unit_tests.c	Guards the wolfSSL ML-DSA include.
configure.ac	Skips unnecessary wolfSSL probes.
.github/workflows/pqc-build-matrix.yml	Adds standalone PQC CI coverage.

Review details

• Files reviewed: 4/4 changed files
• Comments generated: 1
• Review effort level: Lite

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