[release/9.0-preview7] Ensure linux uses zlib-ng and not system ZLIB (#105354)

* Update extra_libs.cmake

* Apply alternate suggestion

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Co-authored-by: Adeel Mujahid <3840695+am11@users.noreply.github.com>
Co-authored-by: Carlos Sánchez López <1175054+carlossanlop@users.noreply.github.com>

Author: 3 people

src/native/libs/System.IO.Compression.Native/extra_libs.cmake

@@ -16,7 +16,7 @@ macro(append_extra_compression_libs NativeLibsExtra)
     # 'zlib' represents our in-tree zlib, and is used in all other platforms
     # that don't meet any of the previous special requirements, like most
     # regular Unix and Windows builds.
-    list(APPEND ZLIB_LIBRARIES $<IF:$<BOOL:CLR_CMAKE_USE_SYSTEM_ZLIB>,z,zlib>)
+    list(APPEND ZLIB_LIBRARIES $<IF:$<BOOL:${CLR_CMAKE_USE_SYSTEM_ZLIB}>,z,zlib>)
   endif ()
   list(APPEND ${NativeLibsExtra} ${ZLIB_LIBRARIES})