Extend coverage for Intl.getCanonicalLocales

test/intl402/Intl/getCanonicalLocales/canonicalized-tags.js

...Intl/getCanonicalLocales/canonicalized-unicode-ext-seq.js

test/intl402/Intl/getCanonicalLocales/descriptor.js

...ntl402/Intl/getCanonicalLocales/elements-not-reordered.js

test/intl402/Intl/getCanonicalLocales/error-cases.js

test/intl402/Intl/getCanonicalLocales/invalid-tags.js

...tl402/Intl/getCanonicalLocales/locales-is-not-a-string.js

...tl402/Intl/getCanonicalLocales/preferred-grandfathered.js

test/intl402/Intl/getCanonicalLocales/preferred-variant.js