Since we do a decent job of pre-sizing objects, don't handle the case where we would need to re-size an object. Also don't handle too-complex shapes.
lobsters stats before:
```
Top-20 calls to C functions from JIT code (79.4% of total 90,051,140):
rb_vm_opt_send_without_block: 19,762,433 (21.9%)
rb_vm_setinstancevariable: 7,698,314 ( 8.5%)
rb_hash_aref: 6,767,461 ( 7.5%)
rb_vm_env_write: 5,373,080 ( 6.0%)
rb_vm_send: 5,049,229 ( 5.6%)
rb_vm_getinstancevariable: 4,535,259 ( 5.0%)
rb_obj_is_kind_of: 3,746,306 ( 4.2%)
rb_ivar_get_at_no_ractor_check: 3,745,237 ( 4.2%)
rb_vm_invokesuper: 3,037,467 ( 3.4%)
rb_ary_entry: 2,351,983 ( 2.6%)
rb_vm_opt_getconstant_path: 1,344,740 ( 1.5%)
rb_vm_invokeblock: 1,184,474 ( 1.3%)
Hash#[]=: 1,064,288 ( 1.2%)
rb_gc_writebarrier: 1,006,972 ( 1.1%)
rb_ec_ary_new_from_values: 902,687 ( 1.0%)
fetch: 898,667 ( 1.0%)
rb_str_buf_append: 833,787 ( 0.9%)
rb_class_allocate_instance: 822,024 ( 0.9%)
Hash#fetch: 699,580 ( 0.8%)
_bi20: 682,068 ( 0.8%)
Top-4 setivar fallback reasons (100.0% of total 7,732,326):
shape_transition: 6,032,109 (78.0%)
not_monomorphic: 1,469,300 (19.0%)
not_t_object: 172,636 ( 2.2%)
too_complex: 58,281 ( 0.8%)
```
lobsters stats after:
```
Top-20 calls to C functions from JIT code (79.0% of total 88,322,656):
rb_vm_opt_send_without_block: 19,777,880 (22.4%)
rb_hash_aref: 6,771,589 ( 7.7%)
rb_vm_env_write: 5,372,789 ( 6.1%)
rb_gc_writebarrier: 5,195,527 ( 5.9%)
rb_vm_send: 5,049,145 ( 5.7%)
rb_vm_getinstancevariable: 4,538,485 ( 5.1%)
rb_obj_is_kind_of: 3,746,241 ( 4.2%)
rb_ivar_get_at_no_ractor_check: 3,745,172 ( 4.2%)
rb_vm_invokesuper: 3,037,157 ( 3.4%)
rb_ary_entry: 2,351,968 ( 2.7%)
rb_vm_setinstancevariable: 1,703,337 ( 1.9%)
rb_vm_opt_getconstant_path: 1,344,730 ( 1.5%)
rb_vm_invokeblock: 1,184,290 ( 1.3%)
Hash#[]=: 1,061,868 ( 1.2%)
rb_ec_ary_new_from_values: 902,666 ( 1.0%)
fetch: 898,666 ( 1.0%)
rb_str_buf_append: 833,784 ( 0.9%)
rb_class_allocate_instance: 821,778 ( 0.9%)
Hash#fetch: 755,913 ( 0.9%)
Top-4 setivar fallback reasons (100.0% of total 1,703,337):
not_monomorphic: 1,472,405 (86.4%)
not_t_object: 172,629 (10.1%)
too_complex: 58,281 ( 3.4%)
new_shape_needs_extension: 22 ( 0.0%)
```
I also noticed that primitive printing in HIR was broken so I fixed that.
Co-authored-by: Aaron Patterson <tenderlove@ruby-lang.org>