[truetype] Clean up bytecode execution triggers. This avoids executing the CV program twice and cleans up the use of 'fpgm' and 'prep' triggers * src/truetype/ttgload.c (tt_loader_init): Call 'tt_size_init_bytecode' and 'tt_size_run_prep' explicitly and avoid the call repetition. * src/truetype/ttobjs.c (tt_size_ready_bytecode): Removed as unused. (tt_size_init, tt_size_init_bytecode, tt_size_done_bytecode): Remove some 'fpgm' and 'prep' triggers and update. (tt_size_run_fpgm, tt_size_run_prep): Do not set the pedantic flag here. * src/truetype/ttobjs.h: Update signatures.