Wrong usage of QueryStringDecoder.decodeComponent in PathPattern

[finalchild]

Describe the bug
PathPattern calls QueryStringDecoder.decodeComponent, which replaces '+' to ' '.

This behavior is expected in query strings, but not in path strings.

(FYI, QueryStringDecoder.decodeComponent has an overloaded version that allows setting isPath=true, but this is a private method.)

To Reproduce
I'm not familiar with finatra, so I don't know what exactly this bug affects, but it seems incoming path decoding would not be working properly.

Expected behavior
"as+df" should be decoded to "as+df", not "as df".

Screenshots
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Environment
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Additional context
I ran into this code digging into a similar tapir bug: softwaremill/tapir#3384