test: upgrade mcp-everything-server to v3 and fix resiliency test race condition (#536)

- Upgrade Docker test server image from v2 to v3 across all test files
- Updates all test files to use the latest version of the mcp-everything-server
Docker image (v3) for integration testing.
- Fix race condition in async client tests by not advertising roots capability during initialization
  - Prevents server from listing roots during init which could cause timing issues when disconnecting immediately after initialization
- Applied fix to AbstractMcpAsyncClientResiliencyTests (both mcp and mcp-test modules) and HttpSseMcpAsyncClientLostConnectionTests

Signed-off-by: Christian Tzolov <christian.tzolov@broadcom.com>
Co-authored-by: Daniel Garnier-Moiroux <git@garnier.wf>