chore(query): add external server request profile

[zhang2014]

I hereby agree to the terms of the CLA available at: https://docs.databend.com/dev/policies/cla/

Summary

chore(query): add external server request profile

Tests

• Unit Test
• Logic Test
• Benchmark Test
• No Test - add profile

Type of change

• Bug Fix (non-breaking change which fixes an issue)
• New Feature (non-breaking change which adds functionality)
• Breaking Change (fix or feature that could cause existing functionality not to work as expected)
• Documentation Update
• Refactoring
• Performance Improvement
• Other (please describe):

---

This change is 

[what-the-diff]

PR Summary

• Profile Statistics Update
  The code updates include a new statistic measure termed ExternalServerRequestCount in the application's profile statistics. This is part of the measure that provides details on the number of external server requests made by the application.

• Changes to Explain Interpreter
  The 'ExplainInterpreter' which helps in understanding how your queries are processed, has been refined. The modifications ensure certain initial and final operations are excluded from the interpretation process for two types of pipelines (explain pipeline and sources pipelines).

• Enhancements in Recording Functionality
  A new update allows an increase in the ExternalServerRequestCount value by one every time the specific code is run in transform_udf_server.rs. This helps keep track of the number of external server requests made during the execution of this file.