[typescript-fetch] Support Sets in query parameters (when uniqueItems=true)

[Nikos410]

Support Sets in query parameters (happens when uniqueItems=true).

Resolves #12317

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[wing328]

@Nikos410 thanks for the PR.

cc @TiFu (2017/07) @taxpon (2017/07) @sebastianhaas (2017/07) @kenisteward (2017/07) @Vrolijkx (2017/09) @macjohnny (2018/01) @topce (2018/10) @akehir (2019/07) @petejohansonxo (2019/11) @amakhrov (2020/02) @davidgamero (2022/03) @mkusaka (2022/04)

[macjohnny]

LGTm
Thanks for your contribution