chore(text-field): add autocomplete attribute

[vdegenne]

Fixes #4837
Fixes #82

[asyncLiz]

We shouldn't strictly type this since there are so many including non-platform standard ones like 1password. I believe we can fix any lit-analyzer errors with as unknown as string

#4837 (comment)

[asyncLiz]

🤌

[asyncLiz]

Yea it's mad at us too. Try swapping it to this:

// Lit analyzer has too strict of types for input autocomplete
// tslint:disable-next-line:no-any
const autocomplete = this.autocomplete as any;

<input autocomplete=${autocomplete || nothing}

We also need to add the attribute to the <textarea>