Log Level indicator should be based on severity number if severity text is of an unknown type

[raj-k-singh]

It is possible for logs to have a non-standard severity text like "ok", "200", "400" etc, along with a standard severity number For example, the severity parser sets only severity number by default and sets severity text to the original value being parsed (like "200") unless an explicit config for overwrite_text is set to true. The overwrite_text option is not even available in older versions of otel collector contrib

In such cases, the log level indicator should be based on severity number instead of defaulting to info

[request-info[bot]]

We would appreciate it if you could provide us with more info about this issue/pr!