[eacsl] Move `runtime_check` from `Smart_stmt` to `Assert`

src/plugins/e-acsl/Makefile.in

src/plugins/e-acsl/src/code_generator/assert.ml

src/plugins/e-acsl/src/code_generator/assert.mli

src/plugins/e-acsl/src/code_generator/contract.ml

src/plugins/e-acsl/src/code_generator/logic_array.ml

src/plugins/e-acsl/src/code_generator/loops.ml

src/plugins/e-acsl/src/code_generator/smart_stmt.ml

src/plugins/e-acsl/src/code_generator/smart_stmt.mli

src/plugins/e-acsl/src/code_generator/translate.ml