[swift] Rename url & path variables to avoid collision

[andyland]

Fixes Issue 18940

This renames the url & path variables to localVarURL and localVarPath to reduce the likelihood of collisions with parameters in the API request

@dydus0x14

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[wing328]

lgtm

cc @jgavris (2017/07) @ehyche (2017/08) @Edubits (2017/09) @jaz-ah (2017/09) @4brunu (2019/11) @dydus0x14 (2023/06)

[wing328]

@andyland thanks for the fix, which has been merged.

please give it a try with the latest master or the snapshot version (published later via Travis CI workflow) to confirm the fix works as expected.

thanks again for your contribution