tools: lint for use of space in template strings

Checklist

• tests and code linting passes
• the commit message follows commit guidelines

Affected core subsystem(s)

tools

Description of change

There are over 70 files in the project using template strings and all of them have followed the convention of no spaces in curly braces.

Good: ${foo}

Not used: ${ foo }

Since the project has adopted a convention, and ESLint has a rule to enforce exactly this convention, enable the rule.