20240119-DoTls13CertificateVerify-CreateSigData-error-handling

[douzzer]

src/tls13.c: in DoTls13CertificateVerify(), add missing error handling in several calls to CreateSigData().

tested with ../testing/git-hooks/wolfssl-multi-test.sh --enable-bwrap --enable-git-blame -j 24 --keep-going --max-check-try-count=3 --no-result-cache --verbose-analyzers --test-uncommitted --verbose-qemu-system pq-all-clang-tidy

problem report from nightly:

[pq-all-clang-tidy] [54 of 216] [ac81d9d29c]
    configure...   real 0m19.953s  user 0m10.616s  sys 0m10.792s
    build...9be390250d (<anhu@users.noreply.github.com> 2024-01-18 16:20:57 -0500 9925)                     args->sigDataSz = sigDataSz;
/home/wolfbot/tmp/wolfssl_test_workdir.56048/wolfssl/src/tls13.c:9925:37: warning: Assigned value is garbage or undefined [clang-analyzer-core.uninitialized.Assign]
9925 |                     args->sigDataSz = sigDataSz;
|                                     ^ ~~~~~~~~~
[...]

[dgarske]

Thanks @douzzer . Over to @SparkiDev for final

[dgarske]

Retest this please