arrow: fix the library name for the libacero component

I think we got this part wrong in conan-io#17540
I'm not sure if this name stays (see apache/arrow#15280) but currently
the file being created is libarrow_acero.a

I'm not sure what to do with names of other components, such as pkg_config: for arrow_substrait
we prepend "arrow_" everywhere, for "arrow_flight_sql" we do not. I've chosen to make
the smallest possible diff that I am sure about.

recipes/arrow/all/conanfile.py

@@ -587,7 +587,7 @@ def package_info(self):
         del self.options.plasma
 
         if self.options.acero:
-            self.cpp_info.components["libacero"].libs = [self._lib_name("acero")]
+            self.cpp_info.components["libacero"].libs = [self._lib_name("arrow_acero")]
             self.cpp_info.components["libacero"].names["cmake_find_package"] = "acero"
             self.cpp_info.components["libacero"].names["cmake_find_package_multi"] = "acero"
             self.cpp_info.components["libacero"].names["pkg_config"] = "acero"