- needs to use async* to declare async generator methods.
- Needs to use yield* if delegating yield semantics are intended.
- Has assignment to private name method, which is not allowed and throws a TypeError at runtime.
- handle multiple $DONE calls
- fix calls to private methods

class-fields-public doesn't apply to all tests that are generated from these templates

Class Fields: convert propname-error into non-generated to avoid creating erroneous tests where restrictions do not align.

# Conflicts:
#	test/language/statements/class/classelementname-abrupt-completion.js
#	test/language/statements/class/fielddefinition-initializer-abrupt-completion.js
#	test/language/statements/class/super-fielddefinition-initializer-abrupt-completion.js

# Conflicts:
#	src/class-fields/default/cls-decl-after-same-line-async-gen.template
#	src/class-fields/default/cls-decl-after-same-line-async-method.template
#	src/class-fields/default/cls-decl-after-same-line-gen.template
#	src/class-fields/default/cls-decl-after-same-line-method.template
#	src/class-fields/default/cls-decl-after-same-line-static-async-gen.template
#	src/class-fields/default/cls-decl-after-same-line-static-async-method.template
#	src/class-fields/default/cls-decl-after-same-line-static-gen.template
#	src/class-fields/default/cls-decl-after-same-line-static-method.template
#	src/class-fields/default/cls-decl-multiple-definitions.template
#	src/class-fields/default/cls-decl-multiple-stacked-definitions.template
#	src/class-fields/default/cls-decl-new-no-sc-line-method.template
#	src/class-fields/default/cls-decl-new-sc-line-generator.template
#	src/class-fields/default/cls-decl-new-sc-line-method.template
#	src/class-fields/default/cls-decl-regular-definitions.template
#	src/class-fields/default/cls-decl-same-line-generator.template
#	src/class-fields/default/cls-decl-same-line-method.template
#	src/class-fields/default/cls-decl-wrapped-in-sc.template
#	src/class-fields/default/cls-expr-after-same-line-async-gen.template
#	src/class-fields/default/cls-expr-after-same-line-async-method.template
#	src/class-fields/default/cls-expr-after-same-line-gen.template
#	src/class-fields/default/cls-expr-after-same-line-method.template
#	src/class-fields/default/cls-expr-after-same-line-static-async-gen.template
#	src/class-fields/default/cls-expr-after-same-line-static-async-method.template
#	src/class-fields/default/cls-expr-after-same-line-static-gen.template
#	src/class-fields/default/cls-expr-after-same-line-static-method.template
#	src/class-fields/default/cls-expr-multiple-definitions.template
#	src/class-fields/default/cls-expr-multiple-stacked-definitions.template
#	src/class-fields/default/cls-expr-new-no-sc-line-method.template
#	src/class-fields/default/cls-expr-new-sc-line-generator.template
#	src/class-fields/default/cls-expr-new-sc-line-method.template
#	src/class-fields/default/cls-expr-regular-definitions.template
#	src/class-fields/default/cls-expr-same-line-generator.template
#	src/class-fields/default/cls-expr-same-line-method.template
#	src/class-fields/default/cls-expr-wrapped-in-sc.template
#	src/class-fields/private-names.case

# Conflicts:
#	src/class-fields/propname-error/cls-decl-variable-name.template
#	src/class-fields/propname-error/cls-expr-variable-name.template

# Conflicts:
#	src/class-fields/propname-constructor.case
#	src/class-fields/propname-error/cls-decl-computed-name.template
#	src/class-fields/propname-error/cls-decl-literal-name.template
#	src/class-fields/propname-error/cls-decl-string-name.template
#	src/class-fields/propname-error/cls-expr-computed-name.template
#	src/class-fields/propname-error/cls-expr-literal-name.template
#	src/class-fields/propname-error/cls-expr-string-name.template

# Conflicts:
#	src/class-fields/eval-err-contains-arguments.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

# Conflicts:
#	src/class-fields/init-err-contains-super.case

some quick fixes for Array.prototype.{flat,flatMap} tests