Support codesigning macOS executables in bun build --compile

[Jarred-Sumner]

What does this PR do?

This does two things:

1. Support codesigning macOS executables in bun build --compile
2. Deletes the hack where we read the last 4096 bytes of the currently running executables itself to see if it ends with "-- Bun --\n" . We now add a __BUN,__bun section in the macho executable so all we need to do is a single pointer lookup to find out if the current executable is a standalone executable and to get the data. This will also reduce memory usage because we no longer need to do another memory allocation to read through the standalone executable's code.

Must TODO before merging:

• Handle > 16 KB right now. It's something to do with the macho section offsetting/rewriting. I'm too sleepy to fix it right now.

How did you verify your code works?

[robobun]

❌ @Jarred-Sumner, your commit 7c034ac has 17 failures in #7145:

test/bundler/cli.test.ts - 2 failing on 🍎 14 x64

test/bundler/cli.test.ts - 2 failing on 🍎 13 x64

test/js/bun/http/bun-serve-static.test.ts - timeout on 🐧 3.20 x64-baseline

test/cli/install/registry/bun-install-registry.test.ts - timeout on 🐧 22.04 x64

test/cli/install/registry/bun-install-registry.test.ts - 1 failing on 🐧 3.20 x64-baseline

test/js/node/test/parallel/fs-watch-recursive-linux-parallel-remove.test.js - 1 failing on 🐧 12 x64-baseline

test/js/node/test/parallel/fs-watch-recursive-linux-parallel-remove.test.js - 1 failing on 🐧 22.04 x64-baseline

test/js/node/test/parallel/fs-watch-recursive-linux-parallel-remove.test.js - 1 failing on 🐧 3.20 aarch64

test/js/node/test/parallel/fs-watch-recursive-linux-parallel-remove.test.js - 1 failing on 🐧 22.04 x64

test/js/node/test/parallel/fs-watch-recursive-linux-parallel-remove.test.js - 1 failing on 🐧 12 x64

test/js/node/test/parallel/fs-watch-recursive-linux-parallel-remove.test.js - 1 failing on 🐧 3.20 x64

test/js/node/test/parallel/fs-watch-recursive-linux-parallel-remove.test.js - 1 failing on 🐧 3.20 x64-baseline

test/js/node/test/parallel/worker-nested-uncaught.test.js - segmentation fault on 🐧 3.20 x64

test/js/node/test/parallel/worker-nested-uncaught.test.js - segmentation fault on 🐧 3.20 x64-baseline

test/integration/next-pages/test/dev-server.test.ts - 1 failing on 🐧 3.20 x64

test/integration/next-pages/test/dev-server.test.ts - 1 failing on 🐧 3.20 x64-baseline

test/js/node/child_process/child_process.test.ts - 1 failing on 🐧 3.20 aarch64

test/js/node/child_process/child_process.test.ts - 1 failing on 🐧 3.20 x64

test/js/node/child_process/child_process.test.ts - 1 failing on 🐧 3.20 x64-baseline

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

test/cli/hot/hot.test.ts - timeout on 🐧 3.20 aarch64

test/cli/hot/hot.test.ts - timeout on 🐧 3.20 x64-baseline

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

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

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

test/js/bun/http/serve.test.ts - SIGTRAP on 🐧 3.20 aarch64

test/js/bun/http/serve.test.ts - SIGILL on 🐧 3.20 x64

test/js/bun/http/serve.test.ts - SIGILL on 🐧 3.20 x64-baseline

test/regression/issue/09041.test.ts - 1 failing on 🐧 20.04 x64-baseline

test/napi/napi.test.ts - 2 failing on 🍎 14 aarch64

test/napi/napi.test.ts - 2 failing on 🍎 13 aarch64

test/napi/napi.test.ts - 2 failing on 🍎 14 x64

test/napi/napi.test.ts - 2 failing on 🍎 13 x64

test/js/node/fs/fs.test.ts - 1 failing on 🍎 13 aarch64

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

test/js/third_party/body-parser/express-bun-build-compile.test.ts - 1 failing on 🍎 13 aarch64

test/js/third_party/body-parser/express-bun-build-compile.test.ts - 1 failing on 🍎 14 aarch64

test/js/third_party/body-parser/express-bun-build-compile.test.ts - 1 failing on 🍎 14 x64

test/js/third_party/body-parser/express-bun-build-compile.test.ts - 1 failing on 🍎 13 x64

test/integration/next-pages/test/next-build.test.ts - annotation error on 🍎 14 aarch64

test/bundler/bundler_compile.test.ts - 6 failing on 🍎 13 aarch64

test/bundler/bundler_compile.test.ts - 6 failing on 🍎 14 aarch64

test/bundler/bundler_compile.test.ts - 34 failing on 🍎 14 x64

test/bundler/bundler_compile.test.ts - 34 failing on 🍎 13 x64