fixed wrong servers 200 ok

[memsharded]

Changelog: Fix: Improve error message when one URL is not a valid server but still returns 200-ok under a Conan "ping" API call.
Docs: Omit

Close #16104

[uilianries]

It looks much better:

conan create .                                                                                                                                                                                                                   08:49:32

======== Exporting recipe to the cache ========
foo/0.1.0: Exporting package recipe: /private/tmp/foo/conanfile.py
foo/0.1.0: Copied 1 '.py' file: conanfile.py
foo/0.1.0: Copied 1 '.txt' file: CMakeLists.txt
foo/0.1.0: Copied 1 '.h' file: foo.h
foo/0.1.0: Copied 1 '.cpp' file: foo.cpp
foo/0.1.0: Exported to cache folder: /tmp/conan/p/foo748e6e2c1494a/e
foo/0.1.0: Exported: foo/0.1.0#b3e7a77cdd77deb2b9ffdaa6fd368fab (2024-04-23 06:49:35 UTC)

======== Input profiles ========
Profile host:
[settings]
arch=armv8
build_type=Release
compiler=apple-clang
compiler.cppstd=gnu17
compiler.libcxx=libc++
compiler.version=15
os=Macos

Profile build:
[settings]
arch=armv8
build_type=Release
compiler=apple-clang
compiler.cppstd=gnu17
compiler.libcxx=libc++
compiler.version=15
os=Macos


======== Computing dependency graph ========
zlib/1.3.1: Not found in local cache, looking in remotes...
zlib/1.3.1: Checking remote: bincrafters
Graph root
    cli
Requirements
    foo/0.1.0#b3e7a77cdd77deb2b9ffdaa6fd368fab - Cache
ERROR: Package 'zlib/1.3.1' not resolved: Remote https://bincrafters.jfrog.io/artifactory/api/conan/public-conan doesn't seem like a valid Conan remote. [Remote: bincrafters].