fix header includes to not use plain prim/functor.hpp in several headers

Author: SteveBronder

stan/math/mix/functor/laplace_likelihood.hpp

@@ -3,7 +3,7 @@
 
 #include <stan/math/mix/functor/hessian_block_diag.hpp>
 #include <stan/math/mix/functor/conditional_copy_and_promote.hpp>
-#include <stan/math/prim/functor.hpp>
+#include <stan/math/prim/functor/apply.hpp>
 #include <stan/math/prim/fun.hpp>
 
 namespace stan {

stan/math/prim/prob/bernoulli_lcdf.hpp

@@ -7,6 +7,7 @@
 #include <stan/math/prim/fun/constants.hpp>
 #include <stan/math/prim/fun/select.hpp>
 #include <stan/math/prim/fun/size_zero.hpp>
+#include <stan/math/prim/fun/sum.hpp>
 #include <stan/math/prim/functor/partials_propagator.hpp>
 
 namespace stan {

stan/math/rev/fun/to_arena.hpp

@@ -4,7 +4,6 @@
 #include <stan/math/prim/fun/Eigen.hpp>
 #include <stan/math/rev/meta.hpp>
 #include <stan/math/rev/core/arena_matrix.hpp>
-#include <stan/math/prim/functor.hpp>
 #include <vector>
 #include <cstring>
 

stan/math/rev/functor/finite_diff_hessian_auto.hpp

@@ -4,7 +4,6 @@
 #include <stan/math/rev/meta.hpp>
 #include <stan/math/rev/core.hpp>
 #include <stan/math/prim/fun/Eigen.hpp>
-#include <stan/math/rev/functor.hpp>
 #include <stan/math/prim/fun/finite_diff_stepsize.hpp>
 #include <stdexcept>
 

stan/math/rev/functor/finite_diff_hessian_times_vector_auto.hpp

@@ -1,11 +1,11 @@
 #ifndef STAN_MATH_REV_FUNCTOR_HESSIAN_TIMES_VECTOR_HPP
 #define STAN_MATH_REV_FUNCTOR_HESSIAN_TIMES_VECTOR_HPP
 
+#include <stan/math/prim/fun/Eigen.hpp>
 #include <stan/math/prim/fun/constants.hpp>
 #include <stan/math/rev/meta.hpp>
 #include <stan/math/rev/core.hpp>
-#include <stan/math/prim/fun/Eigen.hpp>
-#include <stan/math/rev/functor.hpp>
+#include <stan/math/rev/functor/gradient.hpp>
 #include <cmath>
 
 namespace stan {

stan/math/rev/functor/reduce_sum.hpp

@@ -2,7 +2,7 @@
 #define STAN_MATH_REV_FUNCTOR_REDUCE_SUM_HPP
 
 #include <stan/math/prim/meta.hpp>
-#include <stan/math/prim/functor.hpp>
+#include <stan/math/prim/functor/reduce_sum.hpp>
 #include <stan/math/rev/core.hpp>
 
 #include <tbb/task_arena.h>