Remove src/vendor

[reasonerjt]

We are vendoring the dependencies of Harbor in ./src/vendor.
Currently, on main branch ./src/vendor is taking up 59M and ./src is taking 75M, i.e. the vendor folder is using ~90% of the size of all source code. In addition, there's a potential risk of inconsistency that someone may forget vendoring the dependency after updating go.mod.

Therefore, I wanna suggest we stop vendoring the dependencies and use go.mod as single source of truth.

The only negative impact is that it may take longer if we compile the code in container, in that case, we should use a local goproxy to accelerate downloading the moduls.

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[wy65701436]

move it to v2.10

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