[FIX] Incorrect babel jsx attribute generation with hyphenated names in getContent step

[cdn34dd]

What does this PR do?

Ensure hyphenated JSX attribute names (e.g. aria-hidden, data-testid) are emitted as quoted string literals in the getContent output of the babel plugin, preventing Hermes runtime parse errors.

Motivation

Issue 1200

Review checklist (to be filled by reviewers)

• Feature or bugfix MUST have appropriate tests
• Make sure you discussed the feature or bugfix with the maintaining team in an Issue
• Make sure each commit and the PR mention the Issue number (cf the CONTRIBUTING doc)
• If this PR is auto-generated, please make sure also to manually update the code related to the change

[Copilot]

Pull request overview

Fixes a Babel plugin codegen issue where JSX attributes with hyphens (e.g. aria-hidden, data-testid, bg-$backgroundDefault) were being emitted as bare identifiers inside the generated getContent function, producing invalid JS that can fail Hermes parsing.

Changes:

• Emit JSX attribute keys as string literals when the attribute name is not a valid JS identifier (using t.isValidIdentifier).
• Add Jest coverage to ensure hyphenated attribute names are quoted in getContent output and valid identifiers remain unquoted.

Reviewed changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated no comments.

File	Description
packages/react-native-babel-plugin/src/actions/rum/index.ts	Ensures JSX attribute keys generated for getContent use string literals when needed to avoid invalid JS.
packages/react-native-babel-plugin/test/plugin.test.ts	Adds unit tests covering hyphenated attribute key quoting behavior in getContent.

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