Warn if the crash backtrace printed is missing debugging information

[Calinou]

This is caused by the binary not including debugging symbols. Such backtraces generally not useful, as they don't pinpoint which file is the cause of the crash (let alone the line number).

See #55547 for an example where this message would help troubleshooting.

To test this PR locally, add a CRASH_NOW(); call here and recompile: https://github.com/Calinou/godot/blob/24ad30b5141a2b9a078a11971a4c07e5cec68a95/editor/editor_node.cpp#L627

Preview

With debug symbols

================================================================
handle_crash: Program crashed with signal 4
Engine version: Godot Engine v4.0.dev.custom_build (8bb0f2aff1adf013155281756aec86984c095a76)
Dumping the backtrace. Please include this when reporting the bug on https://github.com/godotengine/godot/issues
[1] /lib64/libc.so.6(+0x3d320) [0x7f3c61e62320] (??:0)
[2] EditorNode::_notification(int) (/home/hugo/Documents/Git/godotengine/godot/editor/editor_node.cpp:627)
[3] EditorNode::_notificationv(int, bool) (/home/hugo/Documents/Git/godotengine/godot/./editor/editor_node.h:99)
[4] Object::notification(int, bool) (/home/hugo/Documents/Git/godotengine/godot/core/object/object.cpp:846)
[5] Node::_propagate_ready() (/home/hugo/Documents/Git/godotengine/godot/scene/main/node.cpp:188)
[6] Node::_propagate_ready() (/home/hugo/Documents/Git/godotengine/godot/scene/main/node.cpp:179)
[7] Node::_set_tree(SceneTree*) (/home/hugo/Documents/Git/godotengine/godot/scene/main/node.cpp:?)
[8] SceneTree::initialize() (/home/hugo/Documents/Git/godotengine/godot/scene/main/scene_tree.cpp:402)
[9] OS_LinuxBSD::run() (/home/hugo/Documents/Git/godotengine/godot/platform/linuxbsd/os_linuxbsd.cpp:?)
[10] bin/godot.linuxbsd.tools.64.llvm(main+0x1c6) [0x462dc36] (/home/hugo/Documents/Git/godotengine/godot/platform/linuxbsd/godot_linuxbsd.cpp:58)
[11] /lib64/libc.so.6(__libc_start_main+0xd5) [0x7f3c61e4cb75] (??:0)
[12] bin/godot.linuxbsd.tools.64.llvm(_start+0x2e) [0x462d9ae] (??:?)
-- END OF BACKTRACE --
================================================================
[1]    25649 IOT instruction (core dumped)  bin/godot.linuxbsd.tools.64.llvm /tmp/4/project.godot

Without debug symbols

================================================================
handle_crash: Program crashed with signal 4
Engine version: Godot Engine v4.0.dev.custom_build (8bb0f2aff1adf013155281756aec86984c095a76)
Dumping the backtrace. Please include this when reporting the bug on https://github.com/godotengine/godot/issues
[1] /lib64/libc.so.6(+0x3d320) [0x7f7ad00d6320] (??:0)
[2] EditorNode::_notification(int) (??:?)
[3] EditorNode::_notificationv(int, bool) (??:?)
[4] Object::notification(int, bool) (??:?)
[5] Node::_propagate_ready() (??:?)
[6] Node::_propagate_ready() (??:?)
[7] Node::_set_tree(SceneTree*) (??:?)
[8] SceneTree::initialize() (??:?)
[9] OS_LinuxBSD::run() (??:?)
[10] bin/godot.linuxbsd.tools.64.llvm(main+0x1c6) [0x462dc36] (??:?)
[11] /lib64/libc.so.6(__libc_start_main+0xd5) [0x7f7ad00c0b75] (??:0)
[12] bin/godot.linuxbsd.tools.64.llvm(_start+0x2e) [0x462d9ae] (??:?)

WARNING: This backtrace does not include source information for most files.
As a result, this backtrace is probably not useful to include in a bug report.
To get a useful backtrace, compile a debug build (without stripping its symbols) and run the build until it crashes.

-- END OF BACKTRACE --
================================================================
[1]    26043 IOT instruction (core dumped)  bin/godot.linuxbsd.tools.64.llvm /tmp/4/project.godot

TODO

• Port to Linux/*BSD.
• Port to Windows.
• Port to macOS.