Migrate all `VTable::execute_parent` rewrites onto the ArrayKernels registry

[joseph-isaacs]

Parent rewrites in the executor currently come from two sources: kernels registered on ArrayKernels (looked up via find_execute_parent(parent_id, child_id)) and the per-encoding VTable::execute_parent.

We should only have ArrayKernels, so we can customize the execution of any array, see #7588

Concretely this is two pieces of work.

Move each execute_parent kernels to a registered ArrayKernels.

Core arrays (vortex-array/src/arrays/)

• bool — bool/vtable/mod.rs:177
• chunked — chunked/vtable/mod.rs:266
• decimal — decimal/vtable/mod.rs:196
• dict — dict/vtable/mod.rs:208
• extension — extension/vtable/mod.rs:179
• filter — filter/vtable.rs:174
• fixed_size_list — fixed_size_list/vtable/mod.rs:87
• list — list/vtable/mod.rs:195
• listview — listview/vtable/mod.rs:223
• patched — patched/vtable/mod.rs:304
• primitive — primitive/vtable/mod.rs:195
• struct_ — struct_/vtable/mod.rs:196
• varbin — varbin/vtable/mod.rs:185
• varbinview — varbinview/vtable/mod.rs:220
• list — list/vtable/mod.rs:195
• listview — listview/vtable/mod.rs:223
• patched — patched/vtable/mod.rs:304
• primitive — primitive/vtable/mod.rs:195
• struct_ — struct_/vtable/mod.rs:196
• varbin — varbin/vtable/mod.rs:185
• varbinview — varbinview/vtable/mod.rs:220
• variant — variant/vtable/mod.rs:196

Encodings (encodings/)

• alp — alp/src/alp/array.rs:192
• alp_rd — alp/src/alp_rd/array.rs:311
• bytebool — bytebool/src/array.rs:161
• datetime-parts — datetime-parts/src/array.rs:204
• decimal-byte-parts — decimal-byte-parts/src/decimal_byte_parts/mod.rs:169
• fastlanes/bitpacking — fastlanes/src/bitpacking/vtable/mod.rs:271
• fastlanes/for — fastlanes/src/for/vtable/mod.rs:154
• fastlanes/rle — fastlanes/src/rle/vtable/mod.rs:196
• fsst — fsst/src/array.rs:316
• onpair (experimental) — experimental/onpair/src/array.rs:502
• parquet-variant — parquet-variant/src/vtable.rs:284
• runend — runend/src/array.rs:175 (verify the FilterKernel parity case)
• sequence — sequence/src/array.rs:334
• sparse — sparse/src/lib.rs:297
• zigzag — zigzag/src/array.rs:147

Remove the VTable::execute_parent

• No remaining VTable execute_parent overrides (grep is clean)
• Ready for issue part (2): drop the method fallback in execute_parent_for_child
  and remove the trait method (vtable/mod.rs:189)