update multiline parser config logic

[pfrcks]

This pull request includes changes to the tomlparser.rb file within the build/common/installer/scripts/ directory. The changes focus on modifying the handling of languages supported for multiline logs and stacktraces. The most significant changes involve removing dotnet from the @stacktraceLanguages variable and adjusting the populateSettingValuesFromConfigMap method to handle dotnet as a special case.

Here are the most important changes in detail:

• build/common/installer/scripts/tomlparser.rb: The @stacktraceLanguages variable has been updated to remove dotnet and include a comment indicating the supported languages for multiline logs. It's noted that java is also used for dotnet stacktraces.
• build/common/installer/scripts/tomlparser.rb (within def populateSettingValuesFromConfigMap(parsedConfig)): The handling of dotnet has been adjusted in the method. If dotnet is included in the multilineLanguages, it's removed and java is added to the list, unless java is already included. This change ensures that dotnet stacktraces are handled correctly.