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>

polkadot/node/core/approval-voting/Cargo.toml

@@ -51,5 +51,5 @@ polkadot-node-subsystem-test-helpers = { path = "../../subsystem-test-helpers" }
 assert_matches = "1.4.0"
 kvdb-memorydb = "0.13.0"
 test-helpers = { package = "polkadot-primitives-test-helpers", path = "../../../primitives/test-helpers" }
-log = "0.4.17"
+log = { workspace = true, default-features = true }
 env_logger = "0.9.0"

polkadot/node/core/av-store/Cargo.toml

@@ -28,7 +28,7 @@ sp-consensus = { path = "../../../../substrate/primitives/consensus/common", def
 polkadot-node-jaeger = { path = "../../jaeger" }
 
 [dev-dependencies]
-log = "0.4.17"
+log = { workspace = true, default-features = true }
 env_logger = "0.9.0"
 assert_matches = "1.4.0"
 kvdb-memorydb = "0.13.0"