Make .get() ignore Object.prototype instead of using getOwn

[Jarred-Sumner]

What does this PR do?

This makes it so we never pay attention to Object.prototype when calling getters from Zig. This is a less restrictive mitigation for prototype pollution attacks compared to using getOwn.

How did you verify your code works?

The existing test for glob prototype pollution covers this

[robobun]

❌ @Jarred-Sumner, your commit b11c368 has 11 failures in #4501:

test/js/web/fetch/fetch-tcp-stress.test.ts - timeout on 🍎 14 aarch64

test/js/web/fetch/fetch-tcp-stress.test.ts - 4 failing on 🍎 13 x64

test/js/web/fetch/fetch-tcp-stress.test.ts - timeout on 🍎 14 x64

test/js/web/fetch/fetch-preconnect.test.ts - 1 failing on 🍎 14 aarch64

test/regression/issue/ctrl-c.test.ts - 1 failing on 🍎 13 aarch64

test/cli/install/bun-install.test.ts - 1 failing on 🐧 12 x64-baseline

test/js/web/fetch/fetch.test.ts - 1 failing on 🐧 12 x64

test/js/bun/http/bun-serve-static.test.ts - 1 failing on 🍎 13 aarch64

test/cli/run/require-cache.test.ts - 1 failing on 🪟 x64

test/js/node/child_process/child_process-node.test.js - 1 failing on 🪟 x64-baseline

test/cli/hot/watch.test.ts - 1 failing on 🪟 x64-baseline

test/cli/hot/watch.test.ts - 1 failing on 🪟 x64

test/bundler/bundler_edgecase.test.ts - 1 failing on 🪟 x64-baseline

test/cli/watch/watch.test.ts - 2 failing on 🪟 x64

test/cli/watch/watch.test.ts - 2 failing on 🪟 x64-baseline