all: REVERSE MERGE dev.simd (0e5948d) into master

This commit is a REVERSE MERGE.
It merges dev.simd back into its parent branch, master, for Go 1.27
one last time.

Merge List:

+ 2026-06-01 0e5948dc59 [dev.simd] all: merge master (1cae25d) into dev.simd
+ 2026-06-01 a92cf0ee94 [dev.simd] simd, cmd/compile: add Midway GODEBUG=simd=0 emulation switch
+ 2026-06-01 e3afca43e2 [dev.simd] simd: attempting to pin down the simdgen output-order glitch
+ 2026-06-01 cea3788e05 [dev.simd] simd: add carryless multiply for wasm and for midway
+ 2026-06-01 627bc968ea [dev.simd] simd: add ARM64 PMULL (carrylessMultiplyWidenLo) intrinsic
+ 2026-05-30 80ab7bc1fa [dev.simd] simd: rename LoLong intrinsics to WidenLo
+ 2026-05-30 9764721859 [dev.simd] simdgen: filter arrangement symbols for shaped ARM64 instructions

Change-Id: Id0010ed9bd8e5d7da033d9506f48d367e1232194
diff --git a/codereview.cfg b/codereview.cfg
index e59a1c8..77a74f1 100644
--- a/codereview.cfg
+++ b/codereview.cfg
@@ -1,2 +1 @@
-branch: dev.simd
-parent-branch: master
+branch: master