speed up the testcontainers ldd check using either ctypes or debug/elf

[jiridanek]

Since there's 1000 to 2000 dynamic libs to check in each of our images, the check on a macOS when using ldd can take 70 or more seconds.

When mentioned on a daily meeting, ppl weren't very concerned, so I'm not going to optimize this now.

For the future, already tried out one approach, using the debug/elf package in Go's standard library to simply read the DT_NEEDED field out of the libraries and check that. It's quite a lot of code, but it seems to work, and work fast.
check_elf_file_2.go.txt

Alternatively, it should be possible to just go around loading the dlls from the python script directly, to see if it loads or not

        from ctypes import CDLL
        try:
            CDLL(lib_path)
            print(f"Successfully loaded: {lib}")
        except Exception as e:
            print(f"Error loading {lib}: {e}")

Originally posted by @jiridanek in #871 (comment)