Deprecate commitment variants (#14797)

* Deprecate commitment variants

* Add new CommitmentConfig builders

* Add helpers to avoid allowing deprecated variants

* Remove deprecated transaction-status code

* Include new commitment variants in runtime commitment; allow deprecated as long as old variants persist

* Remove deprecated banks code

* Remove deprecated variants in core; allow deprecated in rpc/rpc-subscriptions for now

* Heavier hand with rpc/rpc-subscription commitment

* Remove deprecated variants from local-cluster

* Remove deprecated variants from various tools

* Remove deprecated variants from validator

* Update docs

* Remove deprecated client code

* Add new variants to cli; remove deprecated variants as possible

* Don't send new commitment variants to old clusters

* Retain deprecated method in test_validator_saves_tower

* Fix clippy matches! suggestion for BPF solana-sdk legacy compile test

* Refactor node version check to handle commitment variants and transaction encoding

* Hide deprecated variants from cli help

* Add cli App comments

banks-client/src/lib.rs

@@ -122,7 +122,7 @@ impl BanksClient {
     pub fn get_fees(
         &mut self,
     ) -> impl Future<Output = io::Result<(FeeCalculator, Hash, Slot)>> + '_ {
-        self.get_fees_with_commitment_and_context(context::current(), CommitmentLevel::Root)
+        self.get_fees_with_commitment_and_context(context::current(), CommitmentLevel::default())
     }
 
     /// Return the cluster rent
@@ -196,7 +196,7 @@ impl BanksClient {
     /// Return the most recent rooted slot height. All transactions at or below this height
     /// are said to be finalized. The cluster will not fork to a higher slot height.
     pub fn get_root_slot(&mut self) -> impl Future<Output = io::Result<Slot>> + '_ {
-        self.get_slot_with_context(context::current(), CommitmentLevel::Root)
+        self.get_slot_with_context(context::current(), CommitmentLevel::default())
     }
 
     /// Return the account at the given address at the slot corresponding to the given