Rahul Joshi 16df489fda [TableGen] Add const variants of accessors for backend (#106658) ...

Split RecordKeeper `getAllDerivedDefinitions` family of functions into
two variants:
  (a) non-const ones that return vectors of `Record *` and 
  (b) const ones, that return vector/ArrayRef of `const Record *`.

This will help gradual migration of TableGen backends to use 
`const RecordKeeper` and by implication change code to work 
with const pointers and better const correctness.

Existing backends are not yet compatible with the const family of
functions, so change them to use a non-constant `RecordKeeper` 
reference, till they are migrated.

2024-09-05 18:35:55 -07:00

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