cmake tool generate smaller pdb on windows

[c8ef]

• Before adding new features and new modules, please go to issues to submit the relevant feature description first.
• Write good commit messages and use the same coding conventions as the rest of the project.
• Please commit code to dev branch and we will merge into master branch in feature
• Ensure your edited codes with four spaces instead of TAB.

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• 增加新特性和新模块之前，请先到issues提交相关特性说明，经过讨论评估确认后，再进行相应的代码提交，避免做无用工作。
• 编写友好可读的提交信息，并使用与工程代码相同的代码规范，代码请用4个空格字符代替tab缩进。
• 请提交代码到dev分支，如果通过，我们会在特定时间合并到master分支上。
• 为了规范化提交日志的格式，commit消息，不要用中文，请用英文描述。

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Based on grpc/grpc#36259, large project can benefit from these flags significantly.

On my windows machine, the default flag:

-- CMAKE_C_FLAGS is /DWIN32 /D_WINDOWS /W3
-- CMAKE_CXX_FLAGS is /DWIN32 /D_WINDOWS /W3 /GR /EHsc
-- CMAKE_EXE_LINKER_FLAGS is /machine:x64
-- CMAKE_SHARED_LINKER_FLAGS is /machine:x64
-- CMAKE_STATIC_LINKER_FLAGS is /machine:x64