[fea] Add a option to choose if use staic runtime library on Windows

[luciouskami]

See #216
In some cases, we need to compile sprc with static runtime library on windows, and the dependence also need it.
So I add a option to choose if use staic runtime library.

[luciouskami]

The pull request has been tested on both Win32 and AMD64 with MSVC.

[holmes1412]

非常感谢！抱歉今天还没有来得及看这块~
我之后会把linux和mac也提取一个cmake参数SRPC_BUILD_STATIC_RUNTIME，ON的话就也对齐windows这个功能。

[luciouskami]

非常感谢！抱歉今天还没有来得及看这块~ 我之后会把linux和mac也提取一个cmake参数SRPC_BUILD_STATIC_RUNTIME，ON的话就也对齐windows这个功能。

嗯，我感觉是需要加一个开关的，workflow也是，这样就避免了我们自己编译的静态的库运行库不一致的问题了。