Can't use find_package to locate opentelemetry_fluentd

[zurex]

Describe your environment Describe any aspect of your environment relevant to the problem, including your platform, build system, version numbers of installed dependencies, etc. If you're reporting a problem with a specific version of a library in this repo, please check whether the problem has been fixed on main branch.

environment: Linux based system.
platform: x86-64
build system: CMake-3.27 & LLVM-18

Steps to reproduce
Describe exactly how to reproduce the error. Include a code sample if applicable.

find_package(opentelemetry-fluentd CONFIG)
cmake_print_variables(OPENTELEMETRY_CPP_FLUENTD_LIBRARIES)

What is the expected behavior?
What did you expect to see?
opentelemetry-cpp-fluentd::trace;opentelemetry-cpp-fluentd::logs

What is the actual behavior?
What did you see instead?

Empty

Additional context
Add any other context about the problem here.

In the description part of exporters/fluentd/cmake/opentelemetry-cpp-fluentd-config.cmake.in, it should return :

• opentelemetry-cpp-fluentd::trace
• opentelemetry-cpp-fluentd::logs

But it try to test the tar exiting or not by if(TARGET opentelemetry-fluentd-cpp::${_TEST_TARGET}), in this package it does't provide such project named as opentelemetry-fluentd-cpp. It should be opentelemetry-fluentd.

[marcalff]

Closing, fixed by #478