Rollup merge of #89036 - nbdd0121:alloc, r=yaahc

Fix missing `no_global_oom_handling` cfg-gating

Cfg-gate these trait impls that are neglected.

These functions compile now because they use `box` syntax which depends on `exchange_malloc` during codegen only; as a result they compiles with cfg `no_global_oom_handling` but shouldn't.

Discovered in #89030 because that PR makes `box` syntax depend on `exchange_malloc` lang item during MIR construction.