crypto,quic: add NULL checks for OpenSSL allocation functions

[armorbreak001]

Fixes: #62774

This PR adds graceful NULL checks for OpenSSL allocation function return values, replacing CHECK() assertions that would abort the process on allocation failure.

Changes

src/crypto/crypto_aes.cc — AES_Cipher()

Replaced CHECK(ctx) with:

if (!ctx) {
  return WebCryptoCipherStatus::FAILED;
}

This matches the pattern already used in AES_CTR_Cipher2() in the same file.

src/crypto/crypto_cipher.cc — CipherBase::CommonInit()

Replaced CHECK(ctx_) with:

if (!ctx_) {
  return ThrowCryptoError(env(),
                          mark_pop_error_on_return.peekError(),
                          "Failed to allocate cipher context");
}

This matches the error handling pattern used elsewhere in the same function.

Note on other locations from #62774

• AES_CTR_Cipher2() — Already has a proper if (!ctx) check (line 238)
• TLSSession::Initialize() — Already has a proper if (!ssl) check (line 794)
• ECKeyExportTraits::DoExport() — This function no longer exists in the current codebase; the EC key handling code has been refactored

[nodejs-github-bot]

Review requested:

• @nodejs/crypto

[nodejs-github-bot]

CI: https://ci.nodejs.org/job/node-test-pull-request/73487/

[codecov]

Codecov Report

❌ Patch coverage is 0% with 4 lines in your changes missing coverage. Please review.
✅ Project coverage is 90.06%. Comparing base (5d578c5) to head (cb76fb6).
⚠️ Report is 138 commits behind head on main.

Files with missing lines	Patch %	Lines
src/crypto/crypto_aes.cc	0.00%	1 Missing and 1 partial ⚠️
src/crypto/crypto_cipher.cc	0.00%	1 Missing and 1 partial ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main   #63040      +/-   ##
==========================================
+ Coverage   89.65%   90.06%   +0.41%     
==========================================
  Files         708      714       +6     
  Lines      220402   225518    +5116     
  Branches    42269    42645     +376     
==========================================
+ Hits       197597   203110    +5513     
+ Misses      14671    14198     -473     
- Partials     8134     8210      +76     

Files with missing lines	Coverage Δ
src/crypto/crypto_aes.cc	53.63% <0.00%> (-0.19%)	⬇️
src/crypto/crypto_cipher.cc	77.28% <0.00%> (-0.16%)	⬇️

... and 146 files with indirect coverage changes

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