Lift dependencies to the workspace (Part 1) (#2070)

Changes (partial https://github.com/paritytech/polkadot-sdk/issues/994):
- Set log to `0.4.20` everywhere
- Lift `log` to the workspace

Starting with a simpler one after seeing
https://github.com/paritytech/polkadot-sdk/pull/2065 from @jsdw.
This sets the `default-features` to `false` in the root and then
overwrites that in each create to its original value. This is necessary
since otherwise the `default` features are additive and its impossible
to disable them in the crate again once they are enabled in the
workspace.

I am using a tool to do this, so its mostly a test to see that it works
as expected.

---------

Signed-off-by: Oliver Tale-Yazdi <oliver.tale-yazdi@parity.io>

Cargo.toml

@@ -536,6 +536,7 @@ default_constructed_unit_structs = { level = "allow", priority = 2 } # stylistic
 [workspace.dependencies]
 polkavm-linker = "0.8.2"
 polkavm-derive = "0.8.0"
+log = { version = "0.4.20", default-features = false }
 
 [profile.release]
 # Polkadot runtime requires unwinding.