Rollup merge of #104263 - albertlarsan68:add-ilog2-to-leading-zeroes-docs, r=scottmcm

Add a reference to ilog2 in leading_zeros integer docs

Fixes #104248

diff --cc library/core/src/num/int_macros.rs
Simple merge

diff --cc library/core/src/num/uint_macros.rs
Simple merge