FindODBC: Add library name for MinGW toolchains

Fixes: #20018
9 jobs for find-odbc-clang-mingw
Status Name Job ID Coverage
  External
passed ghostflow-check-master

passed ghostflow-check-release

passed ghostflow-stager

passed ghostflow-stager

passed ghostflow-stager

passed ghostflow-stager

passed ghostflow-stager

passed ghostflow-stager

passed ghostflow-stager