chore: cleanup all test files (#293)

## Changes made
- Removed all unused imports, and made sure type imports were labeled
correctly
- Updated all comparisons to be more strict
- Simplified loops to remove unneeded closure functions
- Removed all explicit `any` types
- Updated how strings were defined to follow general TypeScript best
practices

## Notes
- We definitely want some kind of linting setup for this repo. I'm going
to bring this up when Blueberry has its next team meeting next week

personalize/main.test.ts

@@ -1,13 +1,9 @@
-import { readableStreamToText, spawn } from "bun";
 import { describe, expect, it } from "bun:test";
 import {
   executeScriptInContainer,
   runTerraformApply,
   runTerraformInit,
   testRequiredVariables,
-  runContainer,
-  execContainer,
-  findResourceInstance,
 } from "../test";
 
 describe("personalize", async () => {