chore: release_steps runs lake exe cache get when needed

chore: set LEAN_VERSION_IS_RELEASE to 1 for v4.25.0-rc1

fix: overeager specialisation reuse in codegen (leanprover#10429)

This PR fixes and overeager reuse of specialisation in the code
generator.

The issue was originally discovered in
https://leanprover.zulipchat.com/#narrow/channel/270676-lean4/topic/Miscompilation.20.28incorrect.20code.29.20in.20new.20compiler/near/540037917
and occurs because the specialisation cache didnt't take the name of
alternatives in pattern matches
into account.

feat: non-commutative ring normalizer in `grind` (leanprover#10375)

This PR adds support for non-commutative ring normalization in `grind`.
The new normalizer also accounts for the `IsCharP` type class. Examples:
```lean
open Lean Grind

variable (R : Type u) [Ring R]
example (a b : R) : (a + 2 * b)^2 = a^2 + 2 * a * b + 2 * b * a + 4 * b^2 := by grind
example (a b : R) : (a + 2 * b)^2 = a^2 + 2 * a * b + -b * (-4) * a - 2*b*a + 4 * b^2 := by grind

variable [IsCharP R 4]
example (a b : R) : (a - b)^2 = a^2 - a * b - b * 5 * a + b^2 := by grind
example (a b : R) : (a - b)^2 = 13*a^2 - a * b - b * 5 * a + b*3*b*3 := by grind
```

refactor: port more of `shell.cpp` to Lean (leanprover#10086)

This PR ports more of the post-initialization C++ shell code to Lean.

All that remains is the initialization of the profiler and task manager.
As initialization tasks rather than main shell code, they were left in
C++ (where the rest of the initialization code currently is).

The `max_memory` and `timeout` Lean options used by the the `--memory`
and `--timeout` command-line options are now properly registered. The
server defaults for max memory and max heartbeats (timeout) were removed
as they were not actually used (because the `server` option that was
checked was neither set nor exists).

This PR also makes better use of the module system in `Shell.lean` and
fixes a minor bug in a previous port where the file name check was
dependent on building the `.ilean` rather than the `.c` file (as was
originally the case).

Fixes leanprover#9879.

(cherry picked from commit db3fb47)

fix: panic in `delabPRange`

chore: set LEAN_VERSION_IS_RELEASE=1

fix: correctly handle non-`Nat` literal types in LCNF `elimDeadBranch…

…es` (leanprover#9703)

This PR changes the LCNF `elimDeadBranches` pass so that it considers
all non-`Nat` literal types to be `⊤`. It turns out that fixing this to
correctly handle all of these types with the current abstract value
representation is surprisingly nontrivial, and it's better to just land
the fix first.

refactor: Expose DeclNameGenerator idx (leanprover#9342)

Backport 275e483 from leanprover#9020.

Co-authored-by: Leni Aniva <[email protected]>

chore: fix test