Fix bugs found in crl.c, keys.c, and ssl_certman.c review

[julek-wolfssl]

crl.c:

• wolfSSL_X509_CRL_dup: add NULL check on input before dereferencing crl->cm
• DupX509_CRL: distinguish empty source CRL list from allocation failure so
  duplicating a CRL with no entries no longer returns MEMORY_E
• wolfSSL_X509_STORE_add_crl: free newly-allocated CRL when wc_LockRwLock_Rd
  fails to avoid leaking it
• InitCRL: propagate wolfSSL_RefInit failure in OPENSSL_ALL +
  WOLFSSL_REFCNT_ERROR_RETURN builds, freeing crlLock (and cond when
  HAVE_CRL_MONITOR is enabled) on the error path

keys.c:

• GetCipherSpec: remove duplicate usingPSK_cipher assignment in
  BUILD_TLS_ECDHE_PSK_WITH_AES_128_CBC_SHA256 case
• GetCipherSpec: return UNSUPPORTED_SUITE for unknown cipher suite bytes in
  the TLS13_BYTE, ECDHE_PSK_BYTE, and SM_BYTE switch blocks, matching the
  behavior of the ECC_BYTE, CHACHA_BYTE, and normal suite switches
• SetKeys: fix misleading indentation on the AESCCM and SM4-CCM dec->aes
  NULL-check return statements

ssl_certman.c:

• AddTrustedPeer: remove dead code that checked peerCert->permittedNames
  and peerCert->excludedNames immediately after XMEMSET zeroed the struct
• AddTrustedPeer: use cm->heap (matching allocation) instead of NULL when
  freeing cert on the ParseCert failure path
• Extract the body of wolfSSL_CertManagerFree into a new static helper
  DoCertManagerFree that unconditionally disposes of the certificate
  manager, bypassing the reference count check. wolfSSL_CertManagerFree
  now delegates to it after the RefDec check.
• wolfSSL_CertManagerNew_ex: on init failure, call DoCertManagerFree
  directly to avoid leaking cm when the reference count was never
  initialized or failed to initialize. Set cm->heap immediately after
  XMEMSET so the forceful free path can use it.

[Copilot]

Pull request overview

This PR addresses several correctness issues across CRL handling, cipher suite parsing, and certificate manager lifetime management (primarily around error paths and resource cleanup).

Changes:

• CRL: fix NULL dereference, correct empty-list duplication behavior, plug a lock-failure leak, and propagate refcount init failures with proper cleanup.
• Cipher suites / key setup: remove redundant PSK flag assignment, return UNSUPPORTED_SUITE for unknown TLS 1.3 / ECDHE_PSK / SM suite bytes, and fix misleading indentation in SetKeys.
• Cert manager: remove dead code in AddTrustedPeer, fix heap usage on a free path, and refactor cert manager disposal into a helper to bypass refcount checks during init failure.

Reviewed changes

Copilot reviewed 3 out of 3 changed files in this pull request and generated 2 comments.

File	Description
src/ssl_certman.c	Refactors cert manager free logic and fixes cleanup paths in wolfSSL_CertManagerNew_ex / AddTrustedPeer.
src/keys.c	Improves cipher suite default handling and cleans up minor logic/indentation issues in key setup.
src/crl.c	Strengthens CRL duplication and store-add behavior, especially on error paths and NULL inputs.

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