Replace FULL_SINGLE_INVERSE with a new version not using diagonlization. Convergence should be similar at reduced cost. Resetting tests for FULL_SINGLE_INVERSE

git-svn-id: svn://svn.code.sf.net/p/cp2k/code/trunk@14620 bac0169d-1eea-4375-b5f6-f89d2ced9994