Remove unnecessary `int_type_width_signed` function

This can just use `Ty::int_size_and_signed` instead of making its own version.

You might want to look at this [ignoring whitespace](https://github.com/rust-lang/rust/pull/134020/files?w=1) since a huge bunch of code got un-indented.

[TEST] Rollup of 5 pull requests

Successful merges:

 - rust-lang#133987 (Define acronym for thread local storage)
 - rust-lang#133992 (Actually walk into lifetimes and attrs in `EarlyContextAndPass`)
 - rust-lang#133993 (Fix: typo in E0751 error explanation)
 - rust-lang#133996 (Move most tests for `-l` and `#[link(..)]` into `tests/ui/link-native-libs`)
 - rust-lang#134020 (Remove unnecessary `int_type_width_signed` function)

try-job: i686-mingw

r? `@ghost`
`@rustbot` modify labels: rollup

…iaskrgr

Rollup of 7 pull requests

Successful merges:

 - rust-lang#133424 (Parse guard patterns)
 - rust-lang#133733 ( compiletest: show the difference between the normalized output and the actual output for lines which didn't match)
 - rust-lang#133993 (Fix: typo in E0751 error explanation)
 - rust-lang#134013 (Adds new intrinsic declaration)
 - rust-lang#134020 (Remove unnecessary `int_type_width_signed` function)
 - rust-lang#134024 (Advent of `tests/ui` (misc cleanups and improvements) [2/N])
 - rust-lang#134038 (deps: Update psm)

r? `@ghost`
`@rustbot` modify labels: rollup

…iaskrgr

Rollup of 7 pull requests

Successful merges:

 - rust-lang#133424 (Parse guard patterns)
 - rust-lang#133733 ( compiletest: show the difference between the normalized output and the actual output for lines which didn't match)
 - rust-lang#133993 (Fix: typo in E0751 error explanation)
 - rust-lang#134013 (Adds new intrinsic declaration)
 - rust-lang#134020 (Remove unnecessary `int_type_width_signed` function)
 - rust-lang#134024 (Advent of `tests/ui` (misc cleanups and improvements) [2/N])
 - rust-lang#134038 (deps: Update psm)

r? `@ghost`
`@rustbot` modify labels: rollup