Case sensitivity for `/bl` is incosistent

[Youssef1313]

• dotnet run -bl:run_lowercase.binlog -> works
• dotnet run -BL:run_uppercase.binlog -> doesn't work
• dotnet build -bl:build_lowercase.binlog -> works
• dotnet build -BL:build_uppercase.binlog -> works

So, for dotnet build, it's case insensitive. For dotnet run, it's case sensitive.

NOTE: dotnet test is similar to dotnet build. It might be that only dotnet run is different?

@baronfel I'm not sure if such consistency is known or not.

[Youssef1313]

Hmm, looks like this is fixed in #46915. Thanks @jjonescz :)