refactor(ast): make AstBuilder not Copy

[overlookmotel]

Incomplete. This breaks a ton of code.

Remove #[derive(Clone, Copy)] from AstBuilder, so we can make it stateful. Alter codegen to make all AstBuilder methods take &self instead of self.

We'll need to refactor a lot of code which uses AstBuilder methods to work around borrow-checker problems that this change introduces.

[overlookmotel]

Warning

This pull request is not mergeable via GitHub because a downstack PR is open. Once all requirements are satisfied, merge this PR as a stack on Graphite.
Learn more

• fix(parser, transformer): fix AstBuilder call sites WIP #11240
• refactor(ast): make AstBuilder not Copy #11239 👈 (View in Graphite)
• refactor(ast): move AstBuilder type definition #11238
• feat(syntax): introduce CommentNodeId #11214
• feat(ast_tools): allow deriving CloneIn on types with #[clone_in(default)] attr #11237
• main

---

How to use the Graphite Merge Queue

Add either label to this PR to merge it via the merge queue:

• 0-merge - adds this PR to the back of the merge queue
• hotfix - for urgent hot fixes, skip the queue and merge this PR next

You must have a Graphite account in order to use the merge queue. Sign up using this link.

An organization admin has enabled the Graphite Merge Queue in this repository.

Please do not merge from GitHub as this will restart CI on PRs being processed by the merge queue.

This stack of pull requests is managed by Graphite. Learn more about stacking.

[overlookmotel]

The issue which originally prompted this work #11213 is now closed. We're taking a different approach now. But this work is still useful as if we complete it, we can count nodes, scopes, symbols etc in parser, and remove the extra AST pass to calculate these counts which currently happens before building Semantic.