Revert #104100, Allow using Range as an Iterator in const contexts.

[fee1-dead]

This fixes #109632.

[rustbot]

r? @m-ou-se

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[rustbot]

Hey! It looks like you've submitted a new PR for the library teams!

If this PR contains changes to any rust-lang/rust public library APIs then please comment with @rustbot label +T-libs-api -T-libs to tag it appropriately. If this PR contains changes to any unstable APIs please edit the PR description to add a link to the relevant API Change Proposal or create one if you haven't already. If you're unsure where your change falls no worries, just leave it as is and the reviewer will take a look and make a decision to forward on if necessary.

Examples of T-libs-api changes:

• Stabilizing library features
• Introducing insta-stable changes such as new implementations of existing stable traits on existing stable types
• Introducing new or changing existing unstable library APIs (excluding permanently unstable features / features without a tracking issue)
• Changing public documentation in ways that create new stability guarantees
• Changing observable runtime behavior of library APIs

[fee1-dead]

@rustbot label +T-libs-api -T-libs

[bors]

☔ The latest upstream changes (presumably #109692) made this pull request unmergeable. Please resolve the merge conflicts.

[fee1-dead]

r? libs

[Mark-Simulacrum]

@bors r+

[bors]

📌 Commit 2412f1b has been approved by Mark-Simulacrum

It is now in the queue for this repository.

[bors]

⌛ Testing commit 2412f1b with merge 1c39afb...

[bors]

☀️ Test successful - checks-actions
Approved by: Mark-Simulacrum
Pushing 1c39afb to master...

[rust-timer]

Finished benchmarking commit (1c39afb): 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
Improvements ✅ (secondary)	-1.5%	[-1.7%, -1.1%]	3
All ❌✅ (primary)	-	-	0

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%	[0.1%, 1.2%]	2
Regressions ❌ (secondary)	3.4%	[3.3%, 3.6%]	2
Improvements ✅ (primary)	-2.2%	[-3.7%, -0.7%]	2
Improvements ✅ (secondary)	-3.2%	[-3.4%, -2.9%]	2
All ❌✅ (primary)	-0.8%	[-3.7%, 1.2%]	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
Regressions ❌ (secondary)	-	-	0
Improvements ✅ (primary)	-	-	0
Improvements ✅ (secondary)	-2.1%	[-2.1%, -2.0%]	2
All ❌✅ (primary)	-	-	0