Inline process.versions.bun in bun build --compile

[Jarred-Sumner]

What does this PR do?

Inline process.versions.bun in bun build --compile

This makes detecting if the compiled executable is Bun more statically analyzable.

For example, tree-sitter has this line:

const binding = require("node-gyp-build")(__dirname);

This code is very difficult for bun build --compile to support.

Instead, they could do:

const binding = typeof process.versions.bun === "string" ?  
  require(`./prebuilds/${process.platform}-${process.arch}.node`) : 
  require("node-gyp-build")(__dirname);

This allows bun build --compile to work with it.

How did you verify your code works?

There is a test

[robobun]

❌ @Jarred-Sumner, your commit 41969fe has 1 failures in #5555:

test/js/bun/http/serve.test.ts - 1 failing on 🍎 x64