IGNITE-27263 C++ Client: Create cmake config file

[arcolight]

This PR adds cmake config files suitable for the find_package() cmake routine.
This PR covers 3 different cases:

1. C++ libraries used as dependency and built separately without install. Main project uses built libraries and headers from the dependency binary directory.
2. C++ libraries used as dependency and build separately with install. Main project uses built libraries and headers from the specified installation directory.
3. C++ libraries used as dependency and built as subfolder of the main cmake project.

Also INSTALL_IGNITE_FILES option removed in this PR because it does not have much sense. Installation controlled by the called target and not an option. Also, install calls needed in the cmake to generate and export cmake targets files properly.
 
Cmake config files will be added to the installation packages in the next task: https://issues.apache.org/jira/browse/IGNITE-27579

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Pull request overview

This PR implements CMake package configuration support for the Apache Ignite C++ Client and ODBC libraries, enabling consumers to find and use these libraries via CMake's find_package() mechanism. The implementation includes config file generation, component-based discovery, pkg-config support, and comprehensive integration tests.

Changes:

• Added CMake config files (ignite-config.cmake.in and ignite-config-version.cmake.in) for package discovery
• Created pkg-config (.pc) files for both client and ODBC components
• Modified library CMakeLists to export targets with proper namespaces and include directories
• Added three integration test configurations to verify package discovery in different scenarios

Reviewed changes

Copilot reviewed 20 out of 20 changed files in this pull request and generated 19 comments.

Show a summary per file

File	Description
modules/platforms/cpp/CMakeLists.txt	Added package config generation, version file creation, and installation rules
modules/platforms/cpp/cmake/ignite-config.cmake.in	Package configuration template for component-based discovery
modules/platforms/cpp/cmake/ignite-config-version.cmake.in	Version compatibility template (currently unused)
modules/platforms/cpp/pkgconfig/*.pc.in	Pkg-config templates for client and ODBC libraries
modules/platforms/cpp/pkgconfig/CMakeLists.txt	Build rules for pkg-config file generation
modules/platforms/cpp/ignite/client/CMakeLists.txt	Export configuration for client library with namespaced targets
modules/platforms/cpp/ignite/odbc/CMakeLists.txt	Export configuration for ODBC library with namespaced targets
modules/platforms/cpp/ignite/common/CMakeLists.txt	Updated include directory configuration for exportable targets
modules/platforms/cpp/ignite/protocol/CMakeLists.txt	Changed link visibility to PUBLIC for dependencies
modules/platforms/cpp/ignite/tuple/CMakeLists.txt	Removed redundant install command
modules/platforms/cpp/cmake/dependencies.cmake	Fixed path reference for config file
modules/platforms/cpp/tests/package-test/*.cpp	Simple linkage test programs for client and ODBC
modules/platforms/cpp/tests/package-test/*/CMakeLists.txt	Test configurations for three integration scenarios
modules/platforms/cpp/tests/package-test/README.md	Documentation for package tests
modules/platforms/cpp/tests/fake_server/CMakeLists.txt	Added explicit msgpack-c dependency
modules/platforms/cpp/ignite/odbc/config/config_tools_test.cpp	Fixed include path

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