fix: create event error when event name is invalid

[zhu-xiaowei]

• PR title and description conform to Pull Request guidelines.

Description of changes:

1. create event error when event name is invalid

How did you test these changes?
added test case for record an event with invalid event name.

Documentation update required?

• No
• Yes (Please include a PR link for the documentation update)

General Checklist

• Added Unit Tests

By submitting this pull request, I confirm that my contribution is made under the terms of the Apache 2.0 license.

[codecov-commenter]

Codecov Report

Patch coverage: 100.00% and project coverage change: -0.13% ⚠️

Comparison is base (1c006ae) 86.65% compared to head (9200bb7) 86.52%.

Additional details and impacted files

@@             Coverage Diff              @@
##               main      #42      +/-   ##
============================================
- Coverage     86.65%   86.52%   -0.13%     
- Complexity      399      400       +1     
============================================
  Files            39       39              
  Lines          1446     1447       +1     
  Branches        126      127       +1     
============================================
- Hits           1253     1252       -1     
- Misses          120      122       +2     
  Partials         73       73              

Files Changed	Coverage Δ
...aws/solution/clickstream/AWSClickstreamPlugin.java	83.72% <100.00%> (+0.19%)	⬆️

... and 1 file with indirect coverage changes

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