Add Pitch Palette Tests Advanced to test suite

Adds 'Pitch Palette Tests Advanced' action (18 blocks) testing settransposition
with pitch blocks. Follows the naming convention from PR sugarlabs#5747.

Removed redundant Pitch Palette (Beginner) as master already includes
the comprehensive 'Pitch Palette Tests Beginner' action with assertions.

Rebased on current master (938a676).

Author: Ashutoshx7