Run Chromatic on PRs, update GitHub Actions + Dependabot

[colinrotherham]

This PR makes the following changes:

1. Set up esbuild: { jsx: 'automatic' } for storybook build
2. Set up NODE_ENV=production for package build
3. Run Chromatic on PRs to prevent future regressions

These changes resolve the error thrown by the Chromatic deployment:

Error: D.jsxDEV is not a function. (In 'D.jsxDEV(t,{...e},void 0,!1,{fileName:"/home/runner/work/nhsuk-react-components/nhsuk-react-components/stories/Form Elements/Button.stories.tsx",lineNumber:59,columnNumber:19},void 0)', 'D.jsxDEV' is undefined)

I've added Dependabot groups to prevent Chromatic CLI warnings coming back:

Warning

This build was created using Chromatic CLI version 11.27.0, which is significantly outdated. Please upgrade your chromatic dependency.

[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud

[colinrotherham]

@JoshuaBates-NHS Just for completeness (and it was noisy) I've suppressed the same "use client" directive warnings in both the package yarn build and the storybook yarn build-storybook via 2578e87

I'll go ahead and merge and we can double check the baseline images are saved 🙏