[POC] Add TypeScript infra based on babel preset

[benamorbe]

What type of PR is this? (check all applicable)

This PR is a POC on adding TypeScript via babel preset instead of ts-loader. The main benefits of using babel/TypeScript combinations:

1. We have 1 compiler/loader instead of 2 separate compilers/loaders.
2. We can use all features of babel! We already have it in Redash!
3. Almost instant compile during development loop! ts-loader is very slow.
4. Check for type errors only when you’re ready. Babel won't compile all TypeScript when we make changes. It simply strips TypeScript. Once you are sure about your experimental code, you can fix the types.
5. Out of the box support for @babel/preset-env in TypeScript for better ES/browsers targeting.

• Refactor
• Feature
• Bug Fix
• New Query Runner (Data Source)
• New Alert Destination
• Other

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Mobile & Desktop Screenshots/Recordings (if there are UI changes)

[arikfr]

Closing this as changes were added to #5027.