[Benchmark X64] [stephentoub] Optimize more regex cases with IndexOfAny

[MihuBot]

Job completed in 1 hour 38 minutes (remote runner delay: 1 minute 17 seconds).
dotnet/runtime#125586
Using arguments: benchmark Regex
Main commit: dotnet/runtime@c38f37a
PR commit: stephentoub/runtime@cd48ad1

See benchmark results at https://gist.github.com/MihuBot/fc3e1b56f57e271bcf91679c16b76299

Artifacts:

• BDN_Artifacts.zip (1 MB)
• results.md (137 KB)