Rollup merge of #138040 - thaliaarchi:use-prelude-size-of.compiler, r=compiler-errors

compiler: Use `size_of` from the prelude instead of imported

Use `std::mem::{size_of, size_of_val, align_of, align_of_val}` from the prelude instead of importing or qualifying them. Apply this change across the compiler.

These functions were added to all preludes in Rust 1.80.

r? ``@compiler-errors``

compiler/rustc_session/src/filesearch.rs

@@ -92,7 +92,7 @@ fn current_dll_path() -> Result<PathBuf, String> {
             if libc::loadquery(
                 libc::L_GETINFO,
                 buffer.as_mut_ptr() as *mut u8,
-                (std::mem::size_of::<libc::ld_info>() * buffer.len()) as u32,
+                (size_of::<libc::ld_info>() * buffer.len()) as u32,
             ) >= 0
             {
                 break;