chore: update dynamicgo to v0.2.9

[Zzhiter]

What type of PR is this?

chore: update dynamicgo to v0.2.9

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前段时间， 有用户在使用 kitexcall 的过程中，在发现了kitex泛化调用的一个bug: https://github.com/a631807682/kitexcall-issue ，最终溯源到这个bug是由于dynamicgo引起的。

昨天 dynamicgo 已经修复这个问题：cloudwego/dynamicgo#57
并且发布了新的release：https://github.com/cloudwego/dynamicgo/releases/tag/v0.2.9
今天早上已经验证过这个问题已经被修复。

kitexcall强依赖于kitex，kitex需要同步升级一下dynamicgo版本。

[Zzhiter]

Unit test failed, need check

[khan-yin]

Unit test failed, need check
@Zzhiter @AsterDY
the example2.proto and bin data need to update in kitex: pkg/generic/jsonpb_test/idl/example2.proto
I changed the example2.proto and bin data in dynamicgo for sint test convertion. https://github.com/cloudwego/dynamicgo/pull/57
details:

[Zzhiter]

@khan-yin Thank you! fixed.

[Zzhiter]

When I update example2.proto, the relevant UT using this file also failed, so I update them too.