[llvm] [Thumb1] Prefer bic instead of lsl/lsr to align stack where possible (PR #82123)

[Eli Friedman via llvm-commits]

efriedma-quic wrote:

Not sure if you intentionally closed this... but for future reference, t2BICri is Thumb2-only, so there's no way to make this work.

https://github.com/llvm/llvm-project/pull/82123