Reallocate by moving funds directly between vault and strategies

[crazybuster]

• adds withdrawFromStrategy and depositToStrategy funds allocation utility functions
• unit & fork tests added

Issue: #937

TODO (important):

• we need to deploy this -> create deploy issue/PR

[sparrowDom]

@shahthepro @DanielVF @franckc this is ready to be reviewed

[franckc]

Took a pass. A few small nits inline otherwise looks great.
Please take a look at the fork tests failures - they seem relevant.

[sparrowDom]

with the latest commit only 1 unrelated Morpho fork test is failing.

[sparrowDom]

@DanielVF a friendly ping

[franckc]

Friendly ping @shahthepro @DanielVF for the review - not urgent at all but now that we have more strategies it would be nice to have that to save on gas and simplifies our weekly allocations.

@sparrowDom as part of this PR, do we also need to update any tooling (like scripts) that we use for generating the allocation transactions?

[shahthepro]

Looks good to me, LGTM

[sparrowDom]

good thinking @franckc! I think @DanielVF uses the brownie allocations.py to build the strategist allocations. @DanielVF do you want me to do the changes there as well, or will you do them as a part of next strategist action?

[DanielVF]

Once we've used this in production for a few weeks, we'll probably want to remove the reallocate function. The gas savings is three transfers vs using deposit withdraw, but in the actual practice with our funds allocations, I don't think it would get used very often. Having two almost duplicate ways to do the same thing in the code isn't a good thing.

We won't make a change for this in this PR though.

[DanielVF]

I have reviewed these changes, and they are good.