clang-format: IntegerLiteralSeparator formatted incorrectly with `s` literal suffix

[vogelsgesang]

WIth the configuration

IntegerLiteralSeparator:
  Binary: 8
  Decimal: 3
  DecimalMinDigits: 5
  Hex: 0

Clang-Format 16.0.3 proposes the following change:

-   RateLimit limit{2, 1000s};
+   RateLimit limit{2, 10'00s};

There are two issues:

1. it seems to consider the s suffix as a digit, and hence place the tick in the wrong place
2. it should not format this number at all, thanks to DecimalMinDigits

[llvmbot]

@llvm/issue-subscribers-clang-format

[vogelsgesang]

this looks very similar to #61676, but it seems the fix did not cover this case here

[owenca]

https://reviews.llvm.org/D150539

[owenca]

/cherry-pick a72b064