test: Refactor test utilities, fix conformance (#476)

# Refactor test utilities, fix conformance

- Add `test-utils` module to streamline test cases
- Rename module `kotlin-sdk-test` -> `integration-test`
- Move test utilities for managing processes, ports, and TypeScript
execution logic
- Make conformance tests work by specifying conformance package version
(0.1.8)

## Motivation and Context
Reuse test infrastructure code, resurrect conformance tests

## How Has This Been Tested?
CI, locally

## Breaking Changes
No

## Types of changes
- [x] Bug fix (non-breaking change which fixes an issue)
- [x] Tests update

## Checklist
<!-- Go over all the following points, and put an `x` in all the boxes
that apply. -->
- [x] I have read the [MCP
Documentation](https://modelcontextprotocol.io)
- [x] My code follows the repository's style guidelines
- [x] New and existing tests pass locally
- [ ] I have added appropriate error handling
- [ ] I have added or updated documentation as needed

.github/workflows/codeql.yml

@@ -69,7 +69,8 @@ jobs:
             :kotlin-sdk-client:compileKotlinJvm \
             :kotlin-sdk-server:compileKotlinJvm \
             :kotlin-sdk:compileKotlinJvm \
-            :kotlin-sdk-test:compileKotlinJvm \
+            :integration-test:compileKotlinJvm \
+            :conformance-test:testClasses \
             -Pkotlin.incremental=false \
             --no-daemon --stacktrace --rerun-tasks