Intl.Locale: follow up tasks, set 1. Ref gh-1538 (#1540)

test/intl402/Locale/constructor-newtarget-undefined.js

test/intl402/Locale/constructor-options-calendar-invalid.js

test/intl402/Locale/constructor-options-calendar-valid.js

test/intl402/Locale/constructor-options-language-invalid.js

test/intl402/Locale/constructor-options-language-valid.js

test/intl402/Locale/constructor-options-region-invalid.js

test/intl402/Locale/constructor-options-region-valid.js

test/intl402/Locale/constructor-options-script-invalid.js

test/intl402/Locale/constructor-options-script-valid.js

test/intl402/Locale/constructor-options.js

test/intl402/Locale/function-prototype.js

test/intl402/Locale/instance-extensibility.js

test/intl402/Locale/instance.js

test/intl402/Locale/invalid-tag-throws-boolean.js

test/intl402/Locale/invalid-tag-throws-null.js

test/intl402/Locale/invalid-tag-throws-number.js

test/intl402/Locale/invalid-tag-throws-symbol.js

test/intl402/Locale/invalid-tag-throws-undefined.js

test/intl402/Locale/invalid-tag-throws.js

test/intl402/Locale/length.js