optimise style attribute for template literal

[tanhauhau]

Tangentially related to #5204, i noticed that there's no optimisation for

<div style={`color: ${color}`}></div>

which should be similar to

<div style='color: {color}'></div>

Before submitting the PR, please make sure you do the following

• It's really useful if your PR relates to an outstanding issue, so please reference it in your PR, or create an explanatory one for discussion. In many cases, features are absent for a reason.
• This message body should clearly illustrate what problems it solves. If there are related issues, remember to reference them.
• Ideally, include a test that fails without this PR but passes with it. PRs will only be merged once they pass CI. (Remember to npm run lint!)

Tests

• Run the tests with npm test or yarn test)

[trbrc]

Wait, wouldn't this just break the workaround for #5204 too? E.g. both h1's in the REPL repro I posted would be broken? Maybe I'm misreading this PR but it doesn't seem like a good idea as long as the optimization has this problem.

[Conduitry]

I think this is probably not a pattern we want to be encouraging. It seems reasonable to me to leave this unoptimized in case someone is doing something weird and needs to opt out.