add proxy lib tests without LD_PRELOAD

[bratpiorka]

add proxy lib tests without LD_PRELOAD + needed fixes

• add tests w/o proxy lib to reusable_proxy wflow
• cleanup ctors/dtors and remove priorities
• initialize logger once (except tests)
• do not destroy proxy lib pool before umf lib

[Copilot]

Pull Request Overview

This PR adds tests that verify the proxy library functionality works correctly without requiring LD_PRELOAD, implementing additional runtime detection mechanisms for the proxy library and cleaning up initialization patterns.

• Adds proxy library detection via dlopen() in addition to LD_PRELOAD environment variable checking
• Simplifies constructor/destructor priorities and consolidates logger initialization to use a single initialization pattern
• Enhances CI testing to validate both proxy library usage scenarios

Reviewed Changes

Copilot reviewed 7 out of 7 changed files in this pull request and generated 1 comment.

Show a summary per file

File	Description
test/utils/utils_log.cpp	Updates test expectations to reflect renamed logging function
src/utils/utils_log.c	Implements single logger initialization pattern with thread-safety
src/utils/utils_load_library.c	Adds debug logging for library open/close operations
src/utils/utils_common.h	Adds dlopen-based proxy library detection alongside LD_PRELOAD check
src/proxy_lib/proxy_lib_linux.c	Removes constructor/destructor priority specifications
src/coarse/coarse.c	Simplifies logger initialization by removing platform-specific patterns
.github/workflows/reusable_proxy_lib.yml	Adds test run without proxy library to CI workflow

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[Copilot]

The hardcoded library name "libumf_proxy.so" makes this code platform-specific to Linux. Consider using a platform-specific macro or variable to support different operating systems (e.g., "libumf_proxy.dll" on Windows).