Filter API parameters in log messages more efficiently

What does this MR do and why?

Previously log parameters were truncated inside LogrageWithTimestamp right before it emitted log lines, but that is a little late because Grape attempts to filter out parameters using ActiveSupport::ParameterFilter#filter. That means every regular expression defined in the filter has to be matched against every parameter in the input payload.

To avoid this unnecessary work, truncate the parameters early in the chain with a new logger plugin.

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