Move intl tests to sub-folders

test/intl402/Collator/prototype/10.3_b.js

test/intl402/Collator/prototype/compare/10.3.2_1_a_L15.js

test/intl402/Collator/prototype/compare/10.3.2_1_c.js

test/intl402/Collator/prototype/compare/10.3.2_CS_a.js

test/intl402/Collator/prototype/compare/10.3.2_CS_b_NN.js

test/intl402/Collator/prototype/compare/10.3.2_CS_c_NN.js

test/intl402/Collator/prototype/compare/10.3.2_CS_d_NN.js

test/intl402/Collator/prototype/compare/10.3.2_L15.js

test/intl402/Collator/prototype/constructor/10.3.1.js

test/intl402/Collator/prototype/resolvedOptions/10.3.3.js

.../intl402/Collator/prototype/resolvedOptions/10.3.3_L15.js

test/intl402/Collator/supportedLocalesOf/10.2.2_L15.js

test/intl402/Collator/supportedLocalesOf/10.2.2_a.js

test/intl402/Collator/supportedLocalesOf/10.2.2_b.js

test/intl402/Date/prototype/13.3.0_1.js

test/intl402/Date/prototype/13.3.0_2.js

test/intl402/Date/prototype/13.3.0_6_1.js

test/intl402/Date/prototype/13.3.0_6_2.js

test/intl402/Date/prototype/13.3.0_7.js

test/intl402/Date/prototype/toLocaleDateString/13.3.2_L15.js