Replace tcx.mk_re_* with Region::new_*

[WaffleLapkin]

Second step in implementing rust-lang/compiler-team#616
r? @lcnr

[rustbot]

Some changes occurred to the core trait solver

cc @rust-lang/initiative-trait-system-refactor

[lcnr]

@bors r+ rollup=never

[bors]

📌 Commit e33e208 has been approved by lcnr

It is now in the queue for this repository.

[bors]

⌛ Testing commit e33e208 with merge 45eec0f...

[bors]

☀️ Test successful - checks-actions
Approved by: lcnr
Pushing 45eec0f to master...

[rust-timer]

Finished benchmarking commit (45eec0f): comparison URL.

Overall result: no relevant changes - no action needed

@rustbot label: -perf-regression

Instruction count

This benchmark run did not return any relevant results for this metric.

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)	3.0%	[3.0%, 3.0%]	1
Regressions ❌ (secondary)	1.6%	[1.6%, 1.6%]	1
Improvements ✅ (primary)	-	-	0
Improvements ✅ (secondary)	-2.6%	[-3.0%, -2.4%]	3
All ❌✅ (primary)	3.0%	[3.0%, 3.0%]	1

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
Regressions ❌ (secondary)	-	-	0
Improvements ✅ (primary)	-	-	0
Improvements ✅ (secondary)	-3.7%	[-4.7%, -2.1%]	3
All ❌✅ (primary)	-	-	0

Binary size

This benchmark run did not return any relevant results for this metric.

Bootstrap: 643.324s -> 645.491s (0.34%)