FindODBC: Do not assume odbc32.lib for MinGW

For MinGW, do not look for odbc32.lib but allow search for libodbc32.a.

Fixes: #18539

Modules/FindODBC.cmake

@@ -90,7 +90,9 @@ set(_odbc_required_libs_names)
 ### Try Windows Kits ##########################################################
 if(WIN32)
   # List names of ODBC libraries on Windows
-  set(ODBC_LIBRARY odbc32.lib)
+  if(NOT MINGW)
+    set(ODBC_LIBRARY odbc32.lib)
+  endif()
   set(_odbc_lib_names odbc32;)
 
   # List additional libraries required to use ODBC library