chore(deps): bump @smithy/smithy-client (#9825)

Bumps the test-versions group with 1 update in the /integration-tests/esbuild directory: [@smithy/smithy-client](https://github.com/smithy-lang/smithy-typescript/tree/HEAD/packages/smithy-client).


Updates `@smithy/smithy-client` from 4.14.16 to 4.15.0
- [Release notes](https://github.com/smithy-lang/smithy-typescript/releases)
- [Changelog](https://github.com/smithy-lang/smithy-typescript/blob/main/packages/smithy-client/CHANGELOG.md)
- [Commits](https://github.com/smithy-lang/smithy-typescript/commits/@smithy/smithy-client@4.15.0/packages/smithy-client)

---
updated-dependencies:
- dependency-name: "@smithy/smithy-client"
  dependency-version: 4.15.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
  dependency-group: test-versions
...

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Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

integration-tests/esbuild/package.json

@@ -22,7 +22,7 @@
   "dependencies": {
     "@apollo/server": "5.5.1",
     "@koa/router": "15.7.0",
-    "@smithy/smithy-client": "4.14.16",
+    "@smithy/smithy-client": "4.15.0",
     "aws-sdk": "2.1693.0",
     "axios": "1.19.0",
     "esbuild": "^0.28.0",