chore(types): add dist/ to typesVersions TS <4

[TreTuna]

Issue

#2474

Description

While @trivikr fixed the issue with prepublishOnly running on the wrong directory and we are now publishing the dist/types/ts3.4 directory, we are still pointing to types/ts3.4 and the types are not being picked up.

This change updates typeVersions to pick up the proper directories for TS <4.0.

Testing

Made this change, npm pack, installed tarball in my TS 3.6 application, works at intended.

Additional context

Add any other context about the PR here.

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[aws-sdk-js-automation]

AWS CodeBuild CI Report

• CodeBuild project: sdk-staging-test
• Commit ID: 10ba7b3
• Result: SUCCEEDED
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[codecov-commenter]

Codecov Report

❗ No coverage uploaded for pull request base (main@401c054). Click here to learn what that means.
The diff coverage is n/a.

@@           Coverage Diff           @@
##             main    #2579   +/-   ##
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  Coverage        ?   60.31%           
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  Files           ?      513           
  Lines           ?    27377           
  Branches        ?     6582           
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  Hits            ?    16512           
  Misses          ?    10865           
  Partials        ?        0           

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[trivikr]

Thank you @TreTuna for the PR!

It's required to be done in codegen as well as all packages.
I've picked up your commit and posted PRs at:

• Prefix dist/ for typesVersions TS<4 smithy-lang/smithy-typescript#384
• fix(clients): prefix dist/ for typesVersions TS<4 #2580

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