(GT-10943): Unify U-00021FE6.

(GT-10943): Unify U-00021FE6.
(U-00021FEC): Apply new conventions for glyph granularity.
(A-IWDSU+21FFA-itaiji-002): New abstract node; use `<-denotational'
for A-U+21FFA-itaiji-002.
(U+21FFA-itaiji-002): Use A-IWDSU+21FFA-itaiji-002 instead of
A-U+21FFA-itaiji-002 as the mother.
(U-00021FFA): Apply new conventions for glyph granularity.
(A-IWDSU+5DE2): New abstract node.
(U+5DE2): Add `<-denotational' for A-IWDSU+5DE2; add
`ideographic-structure'; add `ideographic-structure@apparent'; unify
IWDS1-0174.
(U+5DE3): Apply new conventions for glyph granularity; add
`<-denotational' for A-IWDSU+5DE2.
(A-CU+2F882): New abstract node; use `<-denotational' for U+5DE2.
(CU+2F882): Use A-CU+2F882 instead of U+5DE2 as its mother.
(U-00022010): Apply new conventions for glyph granularity for
components of ideographic-structure.