chore: Emit funnelStepError instead of funnelError where possible

[connorlanigan]

Description

Where possible, we now emit the funnelStepError event instead of funnelError. The funnelStepError event has more information about the context in which the event happened.

This applies to three components:

• Alert (when it is placed inside a step)
• Form (which itself makes up a single step)
• Wizard

Related links, issue #, if available:

• AWSUI-60507

How has this been tested?

Review checklist

The following items are to be evaluated by the author(s) and the reviewer(s).

Correctness

• Changes include appropriate documentation updates.
• Changes are backward-compatible if not indicated, see CONTRIBUTING.md.
• Changes do not include unsupported browser features, see CONTRIBUTING.md.
• Changes were manually tested for accessibility, see accessibility guidelines.

Security

• If the code handles URLs: all URLs are validated through the checkSafeUrl function.

Testing

• Changes are covered with new/existing unit tests?
• Changes are covered with new/existing integration tests?

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[codecov]

Codecov Report

Attention: Patch coverage is 96.96970% with 1 line in your changes missing coverage. Please review.

Project coverage is 96.46%. Comparing base (afdd066) to head (32b1172).
Report is 5 commits behind head on main.

Files with missing lines	Patch %	Lines
src/form/index.tsx	91.66%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #3393      +/-   ##
==========================================
- Coverage   96.47%   96.46%   -0.01%     
==========================================
  Files         805      805              
  Lines       22975    22997      +22     
  Branches     7936     7944       +8     
==========================================
+ Hits        22164    22183      +19     
+ Misses        804      760      -44     
- Partials        7       54      +47     

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