testing/Missing Prim Tests

Description

A few files found by @roualdes in thread The Flattening Refactor are empty and need tests written. The files I need write tests for are:

• test/unit/math/prim/mat/fun/typedefs_test.cpp (@drezap)
• test/unit/math/prim/mat/err/constraint_tolerances.cpp (@drezap)
• test/unit/math/prim/mat/err/check_consistent_size_mvt_test.cpp
• test/unit/math/prim/mat/err/check_consistent_sizes_mvt_test.cpp
• test/unit/math/prim/mat/err/is_consistent_size_mvt_test.cpp (@ode33 #1202)
• test/unit/math/prim/mat/err/is_consistent_sizes_mvt_test.cpp (@ode33 #1202)
• test/unit/math/prim/scal/err/check_consistent_size_test.cpp
• test/unit/math/prim/scal/err/check_consistent_sizes_test.cpp
• test/unit/math/prim/mat/err/is_consistent_size_test.cpp
• test/unit/math/prim/mat/err/is_consistent_sizes_test.cpp
• test/unit/math/prim/mat/err/validate_non_negative_index_test.cpp (@drezap)
• test/unit/math/prim/mat/fun/LDLT_factor_test.cpp
• test/unit/math/prim/mat/fun/columns_dot_product_test.cpp
• test/unit/math/prim/mat/fun/dot_product_test.cpp (@ode33)
• test/unit/math/prim/mat/fun/log_determinant_test.cpp
• test/unit/math/prim/mat/fun/mdivide_left_tri_low_test.cpp
• test/unit/math/prim/mat/fun/mdivide_right_tri_low_test.cpp (@ode33)
• test/unit/math/prim/mat/fun/rows_dot_product_test.cpp (@ode33)

Expected Output

Tests are written.

Current Version:

v2.19.0