[clang] Refactor ASTContext::getDeclAlign() (NFC) (PR #72977)

[Eli Friedman via cfe-commits]

https://github.com/efriedma-quic approved this pull request.

LGTM

See https://llvm.org/docs/CodingStandards.html#don-t-use-braces-on-simple-single-statement-bodies-of-if-else-loop-statements for the rules on use/don't use braces.  A single multi-line statement is sort of on the edge; I tend to prefer braces in that case, but you can go either way.

https://github.com/llvm/llvm-project/pull/72977