UnsafePinned: implement opsem effects of UnsafeUnpin

[RalfJung]

This implements the next step for #125735: actually making UnsafePinned have special opsem effects by suppressing the noalias even if the type is wrapped in an Unpin wrapper.

For backwards compatibility we also still keep the Unpin hack, i.e. a type must be both Unpin and UnsafeUnpin to get noalias.

[rustbot]

The Miri subtree was changed

cc @rust-lang/miri

[rustbot]

r? @davidtwco

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[rustbot]

This PR modifies tests/auxiliary/minicore.rs.

cc @jieyouxu

[RalfJung]

Uh, what is happening with the link checker here? I have no idea why this PR would add new links to NonZeroInner...

[RalfJung]

Uh, no idea what's going on, but it some sort of rustdoc weirdness... Cc @rust-lang/rustdoc

[RalfJung]

@davidtwco will you be fine to review this or should I go look for someone else?

Not sure who else knows their way around our LLVM attribute handling here... @nikic @workingjubilee maybe?

[RalfJung]

@rustbot reroll

[rustbot]

This PR was rebased onto a different main commit. Here's a range-diff highlighting what actually changed.

Rebasing is a normal part of keeping PRs up to date, so no action is needed—this note is just to help reviewers.

[rust-log-analyzer]

The job x86_64-gnu-tools failed! Check out the build log: (web) (plain enhanced) (plain)

Click to see the possible cause of the failure (guessed by this bot)

REPOSITORY                                   TAG       IMAGE ID       CREATED      SIZE
ghcr.io/dependabot/dependabot-updater-core   latest    bcec0b4e062b   9 days ago   783MB
=> Removing docker images...
Deleted Images:
untagged: ghcr.io/dependabot/dependabot-updater-core:latest
untagged: ghcr.io/dependabot/dependabot-updater-core@sha256:b662be51f7b8ef7e2c8464428f14e49cb79c36aa9afb7ecb9221dfe0f507050c
deleted: sha256:bcec0b4e062b5ffe11cc1c2729558c0cd96621c0271ab5e97ff3a56e0c25045a
deleted: sha256:64e147d5e54d9be8b8aa322e511cda02296eda4b8b8d063c6a314833aca50e29
deleted: sha256:5cba409bb463f4e7fa1a19f695450170422582c1bc7c0e934d893b4e5f558bc6
deleted: sha256:cddc6ebd344b0111eaab170ead1dfda24acdfe865ed8a12599a34d338fa8e28b
deleted: sha256:2412c3f334d79134573cd45e657fb6cc0abd75bef3881458b0d498d936545c8d
---
tests/ui/drop_non_drop.rs ... ok
tests/ui/drain_collect.fixed ... ok
tests/ui/duplicate_underscore_argument.rs ... ok
tests/ui/duplicated_attributes.rs ... ok
tests/ui/duration_suboptimal_units_days_weeks.rs ... ok
tests/ui/duration_suboptimal_units.rs ... ok
tests/ui/duration_subsec.rs ... ok
tests/ui/double_parens.fixed ... ok
tests/ui/duration_suboptimal_units_days_weeks.fixed ... ok
tests/ui/duration_suboptimal_units.fixed ... ok
tests/ui/duration_subsec.fixed ... ok
tests/ui/eager_transmute.rs ... ok
tests/ui/elidable_lifetime_names.rs ... ok
tests/ui/empty_docs.rs ... ok
tests/ui/else_if_without_else.rs ... ok
---
...............................................    (147/147)

======== tests/rustdoc-gui/search-filter.goml ========

[ERROR] line 48: Error: The CSS selector "#search-tabs .count.loading" still exists: for command `wait-for-false: "#search-tabs .count.loading"`
    at <file:///checkout/obj/build/x86_64-unknown-linux-gnu/test/rustdoc-gui/doc/test_docs/index.html?search=test>

======== tests/rustdoc-gui/search-result-display.goml ========

[WARNING] line 39: Delta is 0 for "x", maybe try to use `compare-elements-position` instead?