ZhiPu model support AbstractToolCallSupport

[mxsl-gr]

PR content:

1. re-implement ZhiPu function call to support AbstractToolCallSupport
2. function call unit tests

related issue: #1078

[markpollack]

Hi @mxsl-gr can you please send me an updated api key by email,the previous one you sent now gives this error

org.springframework.web.reactive.function.client.WebClientResponseException$Unauthorized: 401 Unauthorized from POST https://open.bigmodel.cn/api/paas/v4/chat/completions

	at org.springframework.web.reactive.function.client.WebClientResponseException.create(WebClientResponseException.java:308)

[mxsl-gr]

Hi @mxsl-gr can you please send me an updated api key by email,the previous one you sent now gives this error

org.springframework.web.reactive.function.client.WebClientResponseException$Unauthorized: 401 Unauthorized from POST https://open.bigmodel.cn/api/paas/v4/chat/completions

	at org.springframework.web.reactive.function.client.WebClientResponseException.create(WebClientResponseException.java:308)

hi, @markpollack , i have checked the key and run the unit test with it, key should still be valid, maybe there are other problems. i sent it again by email, please try it again ❤️

[markpollack]

sorry for the delay and thanks for the key again, turns out I had a typo in an environment variable.

All tests pass, great!

Merged in 935e1a3