[kotlin] fix query parameter encoding (reverted)

[Albertwaninge-2]

to close #22339

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[Albertwaninge-2]

I had expected the generated code in samples>echo_api to be modified after runner the sample generators. But it didn't. If someone can explain why it didn't, I would like to hear it.

[wing328]

cc @karismann (2019/03) @Zomzog (2019/04) @andrewemery (2019/10) @4brunu (2019/11) @yutaka0m (2020/03) @stefankoppier (2022/06) @e5l (2024/10)

[wing328]

thanks again for the pr

did you test this fix locally to confirm it works for your use cases?

[Albertwaninge-2]

thanks again for the pr

did you test this fix locally to confirm it works for your use cases?

Yes, I have and it is working.

[pkubowicz]

This broke handling the most basic query params: turns /api?param=value into incorrect /api?param=[value], treating a single query param value as a list. Please don't upgrade to v7.18.0. I will post a bug report once I prepare a reproducing project.

[rupert-jung-mw]

Also broke handling of preconfigured base URLs, see e.g. #22631

[wing328]

thanks for reviewing the change

reverted via #22727

[timograw]

This actually killed one specific feature in our web app after out CI automatically updated dependencies (it does that for minor version changes). Kotlin Backend and Angular frontend. Took a while to find out what was going on. 7.19.0 fixed it, thanks.