Migrate most of rustc_builtin_macros to diagnostic impls

[clubby789]

cc #100717

This is a couple of days work, but I decided to stop for now before the PR becomes too big. There's around 50 unresolved failures when rustc::untranslatable_diagnostic is denied, which I'll finish addressing once this PR goes thtough

A couple of outputs have changed, but in all instances I think the changes are an improvement/are more consistent with other diagnostics (although I'm happy to revert any which seem worse)

[rustbot]

r? @TaKO8Ki

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[compiler-errors]

one comment

[rustbot]

rustc_macros::diagnostics was changed

cc @davidtwco, @compiler-errors, @JohnTitor, @TaKO8Ki

[compiler-errors]

ty

@bors delegate+

r=me when green

[bors]

✌️ @clubby789 can now approve this pull request

[clubby789]

@bors r=compiler-errors

[bors]

📌 Commit 64f7597 has been approved by compiler-errors

It is now in the queue for this repository.

[bors]

⌛ Testing commit 64f7597 with merge 45749b2...

[bors]

☀️ Test successful - checks-actions
Approved by: compiler-errors
Pushing 45749b2 to master...

[rust-timer]

Finished benchmarking commit (45749b2): comparison URL.

Overall result: ✅ improvements - no action needed

@rustbot label: -perf-regression

Instruction count

This is a highly reliable metric that was used to determine the overall result at the top of this comment.

	mean	range	count
Regressions ❌ (primary)	-	-	0
Regressions ❌ (secondary)	-	-	0
Improvements ✅ (primary)	-0.4%	[-0.4%, -0.4%]	1
Improvements ✅ (secondary)	-	-	0
All ❌✅ (primary)	-0.4%	[-0.4%, -0.4%]	1

Max RSS (memory usage)

Results

This is a less reliable metric that may be of interest but was not used to determine the overall result at the top of this comment.

	mean	range	count
Regressions ❌ (primary)	0.7%	[0.6%, 0.9%]	2
Regressions ❌ (secondary)	-	-	0
Improvements ✅ (primary)	-1.9%	[-3.3%, -0.4%]	2
Improvements ✅ (secondary)	-	-	0
All ❌✅ (primary)	-0.6%	[-3.3%, 0.9%]	4

Cycles

Results

This is a less reliable metric that may be of interest but was not used to determine the overall result at the top of this comment.

	mean	range	count
Regressions ❌ (primary)	0.5%	[0.4%, 0.6%]	2
Regressions ❌ (secondary)	-	-	0
Improvements ✅ (primary)	-	-	0
Improvements ✅ (secondary)	-2.1%	[-2.3%, -2.0%]	3
All ❌✅ (primary)	0.5%	[0.4%, 0.6%]	2