[kealib] Cleanup, fix CMake config

[dg0yt]

Cherry-picked from #35437.

[dg0yt]

ubarsc/kealib#45

[dg0yt]

Pointless patch.

[MonicaLiu0311]

When testing usage, the following error occurs:

1> [CMake] CMake Error at G:/kealib/installed/x64-windows/share/libkea/libkeaTargets.cmake:60 (set_target_properties):
1> [CMake]   The link interface of target "libkea::kea" contains:
1> [CMake] 
1> [CMake]     hdf5::hdf5-shared
1> [CMake] 
1> [CMake]   but the target was not found.  Possible reasons include:
1> [CMake] 
1> [CMake]     * There is a typo in the target name.
1> [CMake]     * A find_package call is missing for an IMPORTED target.
1> [CMake]     * An ALIAS target is missing.
1> [CMake] 
1> [CMake] Call Stack (most recent call first):
1> [CMake]   G:/kealib/installed/x64-windows/share/libkea/libkeaConfig.cmake:27 (include)
1> [CMake]   G:/kealib/scripts/buildsystems/vcpkg.cmake:859 (_find_package)
1> [CMake]   CMakeUsage/CMakeLists.txt:14 (find_package)
1> [CMake] -- Generating done (0.1s)
1> [CMake] CMake Generate step failed.  Build files cannot be regenerated correctly.

test.cpp

#include <iostream>
#include "libkea/KEACommon.h"
using namespace std;
int main()

{

cout << "Hello CMake." << endl;

return 0;

}

CMakeLists.txt

cmake_minimum_required (VERSION 3.8)
set(CMAKE_TOOLCHAIN_FILE "/home/monica/vcpkg/scripts/buildsystems/vcpkg.cmake")
project ("test")
add_library (main "test.cpp")
find_package(libkea CONFIG REQUIRED)

target_link_libraries(main PRIVATE libkea::Kealib)

[dg0yt]

@MonicaLiu0311 Please review again.

[MonicaLiu0311]

The usage test passed on x64-windows (header files found).

[BillyONeal]

Thanks for the fix!