refactor: set default for name in ErrorCode.ts

[DonIsaac]

What does this PR do?

When no name is provided, constructor.name is used. Affects generated error
code files.

How did you verify your code works?

This is a build change. If this code compiles, it works.

[robobun]

❌ Your commit 5905fd3 has 13 failures in #7764:

test/cli/install/registry/bun-install-registry.test.ts - timeout on 🐧 20.04 aarch64

test/v8/v8.test.ts - 22 failing on 🐧 3.20 aarch64

test/v8/v8.test.ts - 22 failing on 🐧 3.20 x64-baseline

test/v8/v8.test.ts - 22 failing on 🐧 3.20 x64

test/js/third_party/jsonwebtoken/async_sign.test.js - 1 failing on 🐧 20.04 x64-baseline

test/js/bun/css/doesnt_crash.test.ts - timeout on 🐧 12 aarch64

test/js/bun/css/doesnt_crash.test.ts - timeout on 🐧 3.20 aarch64

test/js/node/test/parallel/test-zlib-dictionary.js - code 1 on 🐧 22.04 aarch64

test/js/node/test/parallel/test-zlib-dictionary.js - code 1 on 🐧 22.04 x64

test/js/node/test/parallel/test-zlib-dictionary.js - code 1 on 🐧 24.04 x64-baseline

test/js/node/test/parallel/test-zlib-dictionary.js - code 1 on 🐧 12 x64-baseline

test/js/deno/performance/performance.test.ts - 1 failing on 🐧 22.04 x64

test/js/deno/performance/performance.test.ts - 1 failing on 🐧 24.04 x64-baseline

test/bundler/bundler_compile.test.ts - 3 failing on 🐧 22.04 aarch64

test/integration/next-pages/test/next-build.test.ts - 1 failing on 🐧 24.04 aarch64

test/integration/next-pages/test/next-build.test.ts - 1 failing on 🐧 22.04 aarch64

test/integration/next-pages/test/next-build.test.ts - 1 failing on 🐧 22.04 x64-baseline

test/integration/next-pages/test/next-build.test.ts - 1 failing on 🐧 3.20 aarch64

test/js/node/test/parallel/test-net-sync-cork.js - code 1 on 🐧 12 aarch64

test/js/node/test/parallel/test-net-sync-cork.js - code 1 on 🐧 12 x64

test/js/node/test/parallel/test-net-sync-cork.js - code 1 on 🐧 12 x64-baseline

test/js/node/test/parallel/test-net-sync-cork.js - code 1 on 🐧 3.20 aarch64

test/js/node/test/parallel/test-net-sync-cork.js - code 1 on 🐧 3.20 x64-baseline

test/js/node/test/parallel/test-net-sync-cork.js - code 1 on 🐧 3.20 x64

test/js/node/fs/fs.test.ts - timeout on 🪟 2019 x64-baseline

test/js/node/test/parallel/test-fs-readfile-flags.js - code 1 on 🪟 2019 x64

test/js/node/test/parallel/test-fs-readfile-flags.js - code 1 on 🪟 2019 x64-baseline

test/js/node/watch/fs.watchFile.test.ts - 1 failing on 🪟 2019 x64-baseline

test/js/node/test/parallel/test-fs-watch-file-enoent-after-deletion.js - internal assertion failure on 🪟 2019 x64

test/js/node/test/parallel/test-fs-watch-file-enoent-after-deletion.js - internal assertion failure on 🪟 2019 x64-baseline