convert-polynomial-mul-to-ntt: migrate to new mod arith type/poly type

[ZenithalHourlyRate]

mod arith dialect chooses to use a mod arith type to carry out all operations, see #1084. As the convert-polynomial-mul-to-ntt pass needs mod arith, it needs to migrate to new type.

Also, polynomial type is also undergoing migration (#1085). So it might be migrated after both type being migrated.

[github-actions]

This issue has 3 outstanding TODOs:

• lib/Dialect/Polynomial/Transforms/NTTRewrites.cpp:24: migrate to mod arith type
• lib/Dialect/Polynomial/Transforms/NTTRewrites.td:33: migrate to mod arith type
• tests/Dialect/Polynomial/Transforms/BUILD:9: disabled for mod_arith type migration

This comment was autogenerated by todo-backlinks

[github-actions]

This issue has 3 outstanding TODOs:

• lib/Dialect/Polynomial/Transforms/NTTRewrites.cpp:24: migrate to mod arith type
• lib/Dialect/Polynomial/Transforms/NTTRewrites.td:33: migrate to mod arith type
• tests/Dialect/Polynomial/Transforms/BUILD:9: disabled for mod_arith type migration

This comment was autogenerated by todo-backlinks