menu_cbs_deferred_push: convert the uniform dispatch cases to a table

Same treatment as the sublabel switch: 106 groups - 107 labels,
each case a bind and a break - become one const table of label and
callback rows, guards carried inside, linear scan, read-only
link-resolved storage; the sixteen cases with extra logic stay in
the residual switch, and the block's unconditional return after the
dispatch is preserved so a known enum still never falls through to
the label scan. A transient in-binary referee holding the original
function bound identical pointers across all 6,403 enums, zero
mismatches, against this exact form. The file drops 186 lines and
the object 2.2 kilobytes.

Author: libretroadmin