[clang] clang-format: Add AlignFunctionDeclarations attribute to AlignConsecutiveDeclarations (PR #108241)

[Owen Pan via cfe-commits]

================
@@ -20010,6 +20010,17 @@ TEST_F(FormatTest, AlignConsecutiveDeclarations) {
                "  return 0;\n"
                "}() };",
                BracedAlign);
+
+  Alignment.AlignConsecutiveDeclarations.AlignFunctionDeclarations = false;
+  verifyFormat("unsigned int f1(void);\n"
+               "void f2(void);\n"
+               "size_t f3(void);\n",
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owenca wrote:

```suggestion
               "size_t f3(void);",
```

https://github.com/llvm/llvm-project/pull/108241