searchable fix and migration e2e tests

[sundersc]

Description of changes

Searchable migration fix and e2e test.

Description of how you validated changes

• yarn test
• e2e test in local

Checklist

• PR description included
• yarn test passes
• Tests are changed or added
• Relevant documentation is changed or added (and PR referenced)
• New AWS SDK calls or CloudFormation actions have been added to relevant test and service IAM policies

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

Merging #8666 (249f198) into master (73793b4) will increase coverage by 0.00%.
The diff coverage is 100.00%.

@@           Coverage Diff           @@
##           master    #8666   +/-   ##
=======================================
  Coverage   56.97%   56.98%           
=======================================
  Files         741      741           
  Lines       41707    41710    +3     
  Branches     8537     8537           
=======================================
+ Hits        23764    23767    +3     
  Misses      17122    17122           
  Partials      821      821           

Impacted Files	Coverage Δ
...chable-transformer/src/cdk/create-cfnParameters.ts	100.00% <ø> (ø)
...-graphql-auth-transformer/src/accesscontrol/acm.ts	84.53% <100.00%> (+0.32%)	⬆️
...l-auth-transformer/src/graphql-auth-transformer.ts	85.40% <100.00%> (+0.02%)	⬆️
...-transformer/src/graphql-searchable-transformer.ts	96.04% <100.00%> (ø)

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