Leverage Pytest-Xdist for Faster and Cleaner Test Runs

[lekhnath-parajuli-nexyom]

Summary
Updated pytest configuration to run tests in parallel using 4 processes and disabled logging during test runs for cleaner output and faster execution.

Context
Since pytest-xdist is already included in our requirements, this change makes use of its parallel execution capabilities to speed up the test suite. Disabling logging during test runs helps reduce noise and makes test output easier to read. This update improves performance and developer experience without introducing any breaking changes.