Assimp: Cleanup Library Name (#268)

- Updating 'assimplib' to simply 'assimp' to match other 3rd party
naming conventions. This smooths out automation. The 3p PR bot labels
the library 'assimp', not 'assimplib". See 3p bot PR for example:
https://github.com/o3de/o3de/pull/18545/files

---------

Signed-off-by: Gene Walters <[email protected]>
Signed-off-by: AMZN-Gene <[email protected]>

package-system/assimp/Findassimplib.cmake → package-system/assimp/Findassimp.cmake

@@ -18,7 +18,7 @@ if (NOT TARGET ZLIB::ZLIB)
 endif()
 
 # this file actually ingests the library and defines targets.
-set(TARGET_WITH_NAMESPACE "3rdParty::assimplib")
+set(TARGET_WITH_NAMESPACE "3rdParty::assimp")
 if (TARGET ${TARGET_WITH_NAMESPACE})
     return()
 endif()

package-system/assimp/build_config.json

@@ -6,8 +6,8 @@
     "package_url":"https://github.com/assimp/assimp",
     "package_license":"BSD-3-Clause",
     "package_license_file":"LICENSE",
-    "cmake_find_source":"Findassimplib.cmake",
-    "cmake_find_target":"Findassimplib.cmake",
+    "cmake_find_source":"Findassimp.cmake",
+    "cmake_find_target":"Findassimp.cmake",
     "patch_file" : "usd_animations-on-top-of-v5.4.3.patch",
     "Platforms":{
         "Windows":{