feat(openai): support openai v5

[sabrenner]

What does this PR do?

With the release of OpenAI v5, the only thing we needed to account for was some del methods changing their name to delete. Otherwise, our instrumentation is largely unchanged.

This PR mostly fixes tests. There were a few things impacted:

1. We removed our use of nock within OpenAI, as upgrading it caused a cascade of other issues. Instead, we simplify it into a custom server implementation to point OpenAI at (via baseURL/basePath). This also reduces line count/redundant nock calls in different test files 🙌
2. The beta feature we supported is only for OpenAI v4 and does not need to be tested for v5 (as it does not exist anymore)
3. There was a small File error, I think just on my machine which runs Node 18 by default - it likely won't impact CI as I think we run on latest but I wanted to handle it regardless.

Motivation

Support OpenAI v5 and unblock broken CI

MLOB-2927

[github-actions]

Overall package size

Self size: 9.56 MB
Deduped: 104.5 MB
No deduping: 105.02 MB

Dependency sizes

| name | version | self size | total size | |------|---------|-----------|------------| | @datadog/libdatadog | 0.6.0 | 30.47 MB | 30.47 MB | | @datadog/native-appsec | 8.5.2 | 19.33 MB | 19.34 MB | | @datadog/pprof | 5.8.0 | 12.55 MB | 12.92 MB | | @datadog/native-iast-taint-tracking | 4.0.0 | 11.72 MB | 11.73 MB | | @opentelemetry/core | 1.30.1 | 908.66 kB | 7.16 MB | | protobufjs | 7.5.3 | 2.95 MB | 5.6 MB | | @datadog/wasm-js-rewriter | 4.0.1 | 2.85 MB | 3.58 MB | | @datadog/native-metrics | 3.1.1 | 1.02 MB | 1.43 MB | | @opentelemetry/api | 1.8.0 | 1.21 MB | 1.21 MB | | import-in-the-middle | 1.14.0 | 120.58 kB | 841.68 kB | | source-map | 0.7.4 | 226 kB | 226 kB | | opentracing | 0.14.7 | 194.81 kB | 194.81 kB | | lru-cache | 7.18.3 | 133.92 kB | 133.92 kB | | pprof-format | 2.1.0 | 111.69 kB | 111.69 kB | | @datadog/sketches-js | 2.1.1 | 109.9 kB | 109.9 kB | | lodash.sortby | 4.7.0 | 75.76 kB | 75.76 kB | | ignore | 5.3.2 | 53.63 kB | 53.63 kB | | istanbul-lib-coverage | 3.2.2 | 34.37 kB | 34.37 kB | | rfdc | 1.4.1 | 27.15 kB | 27.15 kB | | @isaacs/ttlcache | 1.4.1 | 25.2 kB | 25.2 kB | | dc-polyfill | 0.1.9 | 25.11 kB | 25.11 kB | | tlhunter-sorted-set | 0.1.0 | 24.94 kB | 24.94 kB | | shell-quote | 1.8.2 | 23.54 kB | 23.54 kB | | limiter | 1.1.5 | 23.17 kB | 23.17 kB | | retry | 0.13.1 | 18.85 kB | 18.85 kB | | semifies | 1.0.0 | 15.84 kB | 15.84 kB | | jest-docblock | 29.7.0 | 8.99 kB | 12.76 kB | | crypto-randomuuid | 1.0.0 | 11.18 kB | 11.18 kB | | ttl-set | 1.0.0 | 4.61 kB | 9.69 kB | | mutexify | 1.4.0 | 5.71 kB | 8.74 kB | | path-to-regexp | 0.1.12 | 6.6 kB | 6.6 kB | | koalas | 1.0.2 | 6.47 kB | 6.47 kB | | module-details-from-path | 1.0.4 | 3.96 kB | 3.96 kB |

_{🤖 This report was automatically generated by heaviest-objects-in-the-universe}

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 79.18%. Comparing base (cc2b8a6) to head (d90cb85).
Report is 106 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #5816      +/-   ##
==========================================
+ Coverage   79.15%   79.18%   +0.03%     
==========================================
  Files         522      522              
  Lines       24060    24060              
==========================================
+ Hits        19044    19052       +8     
+ Misses       5016     5008       -8     

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[pr-commenter]

Benchmarks

Benchmark execution time: 2025-06-04 13:52:57

Comparing candidate commit d90cb85 in PR branch sabrenner/change-openai-mocks with baseline commit cc2b8a6 in branch master.

Found 0 performance improvements and 0 performance regressions! Performance is the same for 1269 metrics, 54 unstable metrics.

[datadog-datadog-prod-us1]

Datadog Report

Branch report: sabrenner/change-openai-mocks
Commit report: c3f5f5d
Test service: dd-trace-js-integration-tests

✅ 0 Failed, 1257 Passed, 0 Skipped, 26m 11.23s Total Time

[sabrenner]

once again this work has gone out of date due to reworking mocking to a more shareable solution introduced in #5951, so I will reopen this PR separately