enable aligned new if supported

[lorinlee]

What problem does this PR solve?

Issue Number: #2416

Problem Summary:

What is changed and the side effects?

Changed:

Side effects:

• Performance effects(性能影响):

• Breaking backward compatibility(向后兼容性):

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Check List:

• Please make sure your changes are compilable(请确保你的更改可以通过编译).
• When providing us with a new feature, it is best to add related tests(如果你向我们增加一个新的功能, 请添加相关测试).
• Please follow Contributor Covenant Code of Conduct.(请遵循贡献者准则).

[lorinlee]

@ehds @wwbmmm @zyearn c++17就先不默认打开了，先默认打开aligned-new吧，辛苦review下看看

[uvletter]

The solution is not sophisticated in my opinion. The brpc header file may be included in other translation units, which could be not aligned-new, so the final artifact will be a mixture of aligned-new and non-aligned-new.