fix tests after typescript-sdk became modulized

[Fuud]

Motivation and Context

kotlin-sdk-test uses typescript-sdk from git.
Structure of typescript-sdk was changed, it was splitted on modules, now it requires pnpm.

How Has This Been Tested?

regular gradle build now works as expected

Breaking Changes

no, only tests was changed

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)
• Documentation update

Checklist

• I have read the MCP Documentation
• My code follows the repository's style guidelines
• New and existing tests pass locally
• I have added appropriate error handling
• I have added or updated documentation as needed

Additional context

[kpavlov]

Thank you, @Fuud for PR, but let's make it a bit differently.

1. Get fix: Update/Fix build workflow #474 merged for pipelines to revive
2. Let's resurrect Refactor integration tests to use Testcontainers for TypeScript client and server #310 and build Docker image. Let's run it on Ubuntu host, where Docker is available.
3. Let's build Docker image not from TypeScript SDK source, but from published npm package. Reason: main branch of the SDK repo contains unstable pre-alpha v2 Typescript SDK. Let's not depend on unstable dummy server.