chore: bump jsii to 5.7

[rix0rrr]

We just bumped to 5.6 for the speed. Now we're just bumping to 5.7 to get the latest and greatest new TypeScript features!

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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 78.86%. Comparing base (e03dee1) to head (254a122).
Report is 1 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main   #32595   +/-   ##
=======================================
  Coverage   78.86%   78.86%           
=======================================
  Files         108      108           
  Lines        7165     7165           
  Branches     1319     1319           
=======================================
  Hits         5651     5651           
  Misses       1330     1330           
  Partials      184      184           

Flag	Coverage Δ
suite.unit	78.86% <ø> (ø)

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Components	Coverage Δ
packages/aws-cdk	78.86% <ø> (ø)

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AWS CodeBuild CI Report

• CodeBuild project: AutoBuildv2Project1C6BFA3F-wQm2hXv2jqQv
• Commit ID: 254a122
• Result: SUCCEEDED
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