Add a per client connection max exempt list cript

[bneradt]

Note that this builds on top of #12198, so feel free to ignore that commit when reviewing this. I kept the units of work separate to make this specific cripts work easier to review.

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This updates our build system to be able to make pre-compiled cripts.
Thus, adding a cript is now as easy as adding a plugin. Simply use
add_cript instead of add_atsplugin in CMakeLists.txt, and it will build
your cript for you.

As a part of this, this adds connection_exempt_list.cript, our first
cript plugin that sets the per client exempt list.

[Copilot]

Pull Request Overview

This PR adds support for pre-compiled cript plugins and introduces a connection exempt list cript that manages per-client connection limit exemptions. The PR extends the build system to support cripts as first-class plugins and creates infrastructure for managing client connection exemptions through both configuration files and YAML-based plugins.

Key changes include:

• Build system updates to support pre-compiled cripts via the add_cript CMake function
• New connection exempt list functionality with API functions and configuration options
• Comprehensive test coverage for exempt list scenarios with both inline and file-based configurations

Reviewed Changes

Copilot reviewed 30 out of 32 changed files in this pull request and generated 3 comments.

Show a summary per file

File	Description
cmake/add_cript.cmake	Adds CMake function to build pre-compiled cript plugins
plugins/experimental/connection_exempt_list/connection_exempt_list.cript	New cript plugin for loading exempt lists from YAML files
src/iocore/net/ConnectionTracker.cc	Core logic for client connection exempt list management
include/ts/ts.h	Public API functions for managing connection exempt lists
tests/gold_tests/client_connection/per_client_connection_max.test.py	Expanded test coverage for exempt list functionality
src/records/RecordsConfig.cc	New configuration record for exempt list setting
tools/clang-format.sh	Formatting support for .cript files
Documentation files	API and admin documentation for new features

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