Remove legacy commands

[Jimbo4350]

Changelog

cardano-cli's command line has changed as follows:

cardano-cli - General purpose command-line utility to interact with
cardano-node. Provides specific commands to manage keys, addresses, build &
submit transactions, certificates, etc.
 
 Usage: cardano-cli 
-                     ( shelley
+                     ( legacy
+                     | byron
+                     | shelley
                      | allegra
                      | mary
                      | alonzo
                      | babbage
                      | conway
                      | latest
-                     | legacy
-                     | Legacy commands
-                     | byron
                      | hash
                      | ping
                      | debug commands
@@ -24,6 +23,13 @@
   -h,--help                Show this help text
 
 Available commands:
+  legacy                   Legacy commands
+
+Byron specific commands
+  byron                    Byron specific commands
+
+Available commands:
   shelley                  Shelley era commands - DEPRECATED - will be removed
                            in the future
   allegra                  Allegra era commands - DEPRECATED - will be removed
@@ -35,31 +41,8 @@
   babbage                  Babbage era commands - DEPRECATED - will be removed
                            in the future
   conway                   Conway era commands
-  latest                   Latest era commands (Babbage) - DEPRECATED - will be
+  latest                   Latest era commands (Conway)
-  legacy                   Legacy commands - DEPRECATED - will be removed in the
-                           future
-
-Legacy commands
-  address                  Payment address commands
-  stake-address            Stake address commands
-  key                      Key utility commands
-  transaction              Transaction commands
-  node                     Node operation commands
-  stake-pool               Stake pool commands
-  query                    Node query commands. Will query the local node whose
-                           Unix domain socket is obtained from the
-                           CARDANO_NODE_SOCKET_PATH environment variable.
-  genesis                  Genesis block commands
-  governance               Governance commands
-  text-view                Commands for dealing with Shelley TextView files.
-                           Transactions, addresses etc are stored on disk as
-                           TextView files.
-
-Byron specific commands
-  byron                    Byron specific commands
-
-Available commands:
   hash                     Compute the hash to pass to the various --*-hash
                            arguments of commands.
   ping                     Ping a cardano node either using node-to-node or node-to-client protocol. It negotiates a handshake and keeps sending keep alive messages.

- description: |
    Large deprecation of legacy commands and removal of related code.
# uncomment types applicable to the change:
  type:
  - breaking       # the API has changed in a breaking way

Context

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How to trust this PR

Highlight important bits of the PR that will make the review faster. If there are commands the reviewer can run to observe the new behavior, describe them.

Checklist

• Commit sequence broadly makes sense and commits have useful messages
• New tests are added if needed and existing tests are updated. See Running tests for more details
• Self-reviewed the diff

[carbolymer]

Comment needs updating

[Jimbo4350]

Don't merge until QA signs off cc: @mkoura

[mkoura]

Looking good 👍

I modified cardano-node-tests and cardano-clusterlib-py to work with the change (and stay compatible with older cardano-cli releases), and all regression tests passed.