CPLAT-11842 Update instructions in TestJacket when using function components

[greglittlefield-wf]

Motivation

I noticed that the errors encountered in TestJacket when using function components could use just a touch more information to help guide users.

Changes

• Add note about using Wrapper component to enable getByTestId
• Add note about using mountNode directly if possible
• Update doc comments to match error messages

Release Notes

• Add more info around function components in TestJacket error messages and doc comments

Review

See CONTRIBUTING.md for more details on review types (+1 / QA +1 / +10) and code review process.

Please review:

QA Checklist

• Tests were updated and provide good coverage of the changeset and other affected code
• Manual testing was performed if needed
  • Anything falling under manual testing criteria outlined in CONTRIBUTING.md

Merge Checklist

While we perform many automated checks before auto-merging, some manual checks are needed:

• A Client Platform member has reviewed these changes
• There are no unaddressed comments - this check can be automated if reviewers use the "Request Changes" feature
• For release PRs - Version metadata in Rosie comment is correct

[aviary3-wk]

Security Insights

No security relevant content was detected by automated scans.

Action Items

• Review PR for security impact; comment "security review required" if needed or unsure
• Verify aviary.yaml coverage of security relevant code

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[willdrach-wk]

Looks good to me, this is nice to know.

[greglittlefield-wf]

Feedback addressed, and I cherry-picked a commit from Aaron's PR to fix Travis

[aaronlademann-wf]

QA +1

[aaronlademann-wf]

@Workiva/release-management-pp

[rmconsole-wf]

+1 from RM