feat: add SelectNative

[kurtdoherty]

Context

• Form controls are foundational to any product, so it's important we provide implementations of the form controls in the Design System.
• Native components are low-hanging fruit, so we're starting with them.

This PR

• Adds new SelectNative component. It's largely identical to the CompactSelectNative component already available in Elements, only this one has styles for when the form control is validated as part of a form and its value is determined to be invalid. Importantly, error styles are only applied when the form control is marked as "touched."

[rpt-uk-github]

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[codacy-production]

Coverage summary from Codacy

See diff coverage on Codacy

Coverage variation	Diff coverage
Report missing for 96ec3c81	✅ 100.00%

Coverage variation details

	Coverable lines	Covered lines	Coverage
Common ancestor commit (96ec3c8)	Report Missing	Report Missing	Report Missing
Head commit (abd58fc)	9080	8392	92.42%

Coverage variation is the difference between the coverage for the head and common ancestor commits of the pull request branch: <coverage of head commit> - <coverage of common ancestor commit>

Diff coverage details

	Coverable lines	Covered lines	Diff coverage
Pull request (#756)	30	30	100.00%

Diff coverage is the percentage of lines that are covered by tests out of the coverable lines that the pull request added or modified: <covered lines added or modified>/<coverable lines added or modified> * 100%

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Footnotes

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