Add features for class public fields

src/class-fields/class-evaluation-error/cls-decl.template

src/class-fields/class-evaluation-error/cls-expr.template

src/class-fields/default/cls-decl.template

src/class-fields/default/cls-expr.template

src/class-fields/eval-err-contains-arguments.case

src/class-fields/eval-err-contains-newtarget.case

src/class-fields/eval-err-contains-supercall-1.case

src/class-fields/eval-err-contains-supercall-2.case

src/class-fields/eval-err-contains-supercall.case

src/class-fields/eval-err-contains-superproperty-1.case

src/class-fields/eval-err-contains-superproperty-2.case

src/class-fields/init-err-contains-arguments.case

src/class-fields/init-err-contains-super.case

...s/productions/cls-decl-after-same-line-async-gen.template

...roductions/cls-decl-after-same-line-async-method.template

...-fields/productions/cls-decl-after-same-line-gen.template

...elds/productions/cls-decl-after-same-line-method.template

...ctions/cls-decl-after-same-line-static-async-gen.template

...ons/cls-decl-after-same-line-static-async-method.template

.../productions/cls-decl-after-same-line-static-gen.template