Enforce consistent and correct toml formatting (#2518)

Using taplo, fixes all our broken and inconsistent toml formatting and
adds CI to keep them tidy.

If people want we can customise the format rules as described here
https://taplo.tamasfe.dev/configuration/formatter-options.html

@ggwpez, I suggest zepter is used only for checking features are
propagated, and leave formatting for taplo to avoid duplicate work and
conflicts.

TODO
- [x] Use `exclude = [...]` syntax in taplo file to ignore zombienet
tests instead of deleting the dir

---------

Signed-off-by: Oliver Tale-Yazdi <oliver.tale-yazdi@parity.io>
Co-authored-by: Oliver Tale-Yazdi <oliver.tale-yazdi@parity.io>
Co-authored-by: Bastian Köcher <git@kchr.de>

polkadot/node/test/client/Cargo.toml

@@ -38,7 +38,7 @@ sp-keyring = { path = "../../../../substrate/primitives/keyring" }
 futures = "0.3.21"
 
 [features]
-runtime-benchmarks= [
+runtime-benchmarks = [
 	"frame-benchmarking/runtime-benchmarks",
 	"polkadot-primitives/runtime-benchmarks",
 	"polkadot-test-runtime/runtime-benchmarks",

polkadot/node/test/service/Cargo.toml

@@ -63,8 +63,8 @@ substrate-test-utils = { path = "../../../../substrate/test-utils" }
 tokio = { version = "1.24.2", features = ["macros"] }
 
 [features]
-runtime-metrics=[ "polkadot-test-runtime/runtime-metrics" ]
-runtime-benchmarks= [
+runtime-metrics = ["polkadot-test-runtime/runtime-metrics"]
+runtime-benchmarks = [
 	"frame-system/runtime-benchmarks",
 	"pallet-balances/runtime-benchmarks",
 	"pallet-staking/runtime-benchmarks",