#14720 Probe std::stacktrace by linking instead of trusting the feature macro

libstdc++ defines __cpp_lib_stacktrace from GCC 13 on, but the implementation
lives in libstdc++exp, which some distributions do not ship (Red Hat's
gcc-toolset among them). The header-only feature test then reports the feature
as present and the link fails with undefined references to
std::__stacktrace_impl::_S_current.

Add cmake/StdStacktrace.cmake, which probes the feature by actually linking:
first with no extra library, then with stdc++exp. The result selects the link
library through RESINSIGHT_STACKTRACE_LIBRARIES, or defines
RIA_HAS_STD_STACKTRACE=0 project-wide when neither links, so the crash handler
compiles out its stack-trace capture and logs the signal only.

RiaMainTools.cpp and RiaOpenTelemetryManager.h now honour a
RIA_HAS_STD_STACKTRACE definition from the build system and only include
<stacktrace> when the feature is enabled.

Follow-up to #14045.

ApplicationLibCode/CMakeLists.txt

@@ -321,34 +321,12 @@ if(${CMAKE_SYSTEM_NAME} MATCHES "Linux")
   # According to ivarun rt is needed on OpenSuse, and Fedora. See:
   # https://github.com/OPM/ResInsight/pull/7
   list(APPEND EXTERNAL_LINK_LIBRARIES rt)
-
-  # std::stacktrace requires stdc++exp. If a custom build of GCC stdc++exp is
-  # required, define the search path here.
-  set(RESINSIGHT_GCC_STDCPP_EXP_PATH
-      ""
-      CACHE PATH "Path to search for stdc++exp"
-  )
-
-  if(RESINSIGHT_GCC_STDCPP_EXP_PATH)
-    find_library(
-      STDCPP_EXP_LIBRARY
-      NAMES stdc++exp
-      HINTS ${RESINSIGHT_GCC_STDCPP_EXP_PATH}
-    )
-    if(STDCPP_EXP_LIBRARY)
-      message(
-        STATUS
-          "stdc++exp library found at custom location: ${STDCPP_EXP_LIBRARY}"
-      )
-      list(APPEND EXTERNAL_LINK_LIBRARIES ${STDCPP_EXP_LIBRARY})
-    endif()
-  else()
-    # stdc++exp is required for std::stacktrace
-    message(STATUS "stdc++exp library found at default location")
-    list(APPEND EXTERNAL_LINK_LIBRARIES stdc++exp)
-  endif()
 endif()
 
+# std::stacktrace needs stdc++exp on most libstdc++ toolchains. Which library,
+# if any, is probed in cmake/StdStacktrace.cmake.
+list(APPEND EXTERNAL_LINK_LIBRARIES ${RESINSIGHT_STACKTRACE_LIBRARIES})
+
 target_link_libraries(
   ApplicationLibCode PUBLIC ${LINK_LIBRARIES} ${EXTERNAL_LINK_LIBRARIES}
 )