swift main signature changed due to support array result feature

[甯尤刚 <ni...@navercorp.com>]

Hi, dear openwhiskers.

   Then, all runtimes except ballerina image have supported `An action supports not only a JSON object but also a JSON array`, and supports sequence action as well.

   One important part is, only swift image's main signature has been changed from `func main(args: Any) -> Any {....}` to `func main(args: Any) -> Any {.....}`
   If you used swift image, please change it to the new signature `func main(args: Any) -> Any {.....}`

    Another thing is, if you have failed test cases on upstream prs, please do rebase operation to avoid swift test case failed due to `swift signature changed`.


Thanks

   
Relative prs as below

Openwhisk core:    
https://github.com/apache/openwhisk/pull/5290
https://github.com/apache/openwhisk/pull/5311

Openwhisk runtimes:
https://github.com/apache/openwhisk-runtime-go/pull/170
https://github.com/apache/openwhisk-runtime-java/pull/140
https://github.com/apache/openwhisk-runtime-python/pull/129
https://github.com/apache/openwhisk-runtime-php/pull/120
https://github.com/apache/openwhisk-runtime-docker/pull/92
https://github.com/apache/openwhisk-runtime-ruby/pull/72
https://github.com/apache/openwhisk-runtime-dotnet/pull/65
https://github.com/apache/openwhisk-runtime-rust/pull/39
https://github.com/apache/openwhisk-runtime-swift/pull/150
https://github.com/apache/openwhisk-runtime-deno/pull/14

Openwhisk-CLI:
https://github.com/apache/openwhisk-cli/pull/516 (doing)
https://github.com/apache/openwhisk-client-go/pull/153
https://github.com/apache/openwhisk-wskdeploy/pull/1153


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