Update base for Update on "[ExecuTorch] Dramatically improve op_clamp build time"

Instead of building `O(|CTYPE_IN| * |CTYPE_MIN| * |CTYPE_MAX| * |CTYPE_OUT|)` kernel code (where |T| means the number of possibilities for type T), we build `O((|CTYPE_IN| + |CTYPE_MIN| + |CTYPE_MAX| + |CTYPE_COMMON|) * |CTYPE_OUT|)` kernel code. (Concretely, `ET_SWITCH_REALHB_TYPES` has 9 possibilities, so I estimate that we went from 9**4 = 6561 template instantiations to 9 * 4 * 9 = 324
instantiations, or a 20x reduction.)


Differential Revision: [D63681034](https://our.internmc.facebook.com/intern/diff/D63681034/)

[ghstack-poisoned]

Author: swolchok