Auto merge of #91692 - matthiaskrgr:rollup-u7dvh0n, r=matthiaskrgr

Rollup of 6 pull requests

Successful merges:

 - #87599 (Implement concat_bytes!)
 - #89999 (Update std::env::temp_dir to use GetTempPath2 on Windows when available.)
 - #90796 (Remove the reg_thumb register class for asm! on ARM)
 - #91042 (Use Vec extend instead of repeated pushes on several places)
 - #91634 (Do not attempt to suggest help for overly malformed struct/function call)
 - #91685 (Install llvm tools to sysroot when assembling local toolchain)

Failed merges:

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

compiler/rustc_span/src/symbol.rs

@@ -439,6 +439,7 @@ symbols! {
         compiler_builtins,
         compiler_fence,
         concat,
+        concat_bytes,
         concat_idents,
         conservative_impl_trait,
         console,
@@ -1058,7 +1059,6 @@ symbols! {
         reg_nonzero,
         reg_pair,
         reg_ptr,
-        reg_thumb,
         reg_upper,
         register_attr,
         register_tool,