[clang] [clang-tools-extra] Reland [clang][Sema, Lex, Parse] Preprocessor embed in C and C++ (PR #95802)

[Donát Nagy via cfe-commits]

================
@@ -441,6 +441,7 @@ tok::PPKeywordKind IdentifierInfo::getPPKeywordID() const {
   CASE( 4, 'e', 's', else);
   CASE( 4, 'l', 'n', line);
   CASE( 4, 's', 'c', sccs);
+  CASE(5, 'e', 'b', embed);
----------------
NagyDonat wrote:

```suggestion
  CASE( 5, 'e', 'b', embed);
```
Just drive-by bikeshedding -- consider aligning this like the lines around it.

https://github.com/llvm/llvm-project/pull/95802