Store all binaries in https://github.com/crytic/solc

[montyly]

We frequently have timeout in our CI (ex: https://github.com/crytic/slither/runs/7537262148?check_suite_focus=true) because when solc-select installs everything, it makes a lot of requests to [binaries.soliditylang](https://binaries.soliditylang.org).

We could store all the binaries in https://github.com/crytic/solc, and when the user run install all

• Clone crytic/solc, and copy all the binaries at once
• And only switch to https://binaries.soliditylang.org for the versions that are not there.

This will significantly reduce the number of requests and prevent the CI to fail.

We will need to update crytic/solc more often, but I think that would be ok.

[bohendo]

Foundation is in place via PR#3 to crytic/solc. Still some work needed in solc-select to utilize the newly added solc binaries.

In the meantime, do we really need to solc-select install all before slither tests? Why not install only the versions that are actually used? No matter how much crytic/solc helps, slither ci will be much faster & stable if it doesn't download solc versions that it doesn't needed.

[montyly]

We can switch to individual version for the detectors, but the AST parsing actually use all the versions, so we won't be able to save time there.