fix: query txs command adds output flag (#9540)

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## Description

* `Query txs` command adds `output` flag, to make it consistent with other query commands.

* Delete unused flag `keyring-backend`.

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---

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CHANGELOG.md

@@ -36,6 +36,7 @@ Ref: https://keepachangelog.com/en/1.0.0/
 
 ## [Unreleased]
 
+* [\#9540](https://github.com/cosmos/cosmos-sdk/pull/9540) Add output flag for query txs command.
 * [\#9460](https://github.com/cosmos/cosmos-sdk/pull/9460) Fix lint error in `MigratePrefixAddress`.
 * [\#9428](https://github.com/cosmos/cosmos-sdk/pull/9428) Optimize bank InitGenesis. Removed bank keeper's `k.setBalances` and `k.clearBalances`. Added `k.initBalances`.
 * [\#9231](https://github.com/cosmos/cosmos-sdk/pull/9231) Remove redundant staking errors.

x/auth/client/cli/query.go

@@ -198,8 +198,7 @@ $ %s query txs --%s 'message.sender=cosmos1...&message.action=withdraw_delegator
 		},
 	}
 
-	cmd.Flags().StringP(flags.FlagNode, "n", "tcp://localhost:26657", "Node to connect to")
-	cmd.Flags().String(flags.FlagKeyringBackend, flags.DefaultKeyringBackend, "Select keyring's backend (os|file|kwallet|pass|test)")
+	flags.AddQueryFlagsToCmd(cmd)
 	cmd.Flags().Int(flags.FlagPage, rest.DefaultPage, "Query a specific page of paginated results")
 	cmd.Flags().Int(flags.FlagLimit, rest.DefaultLimit, "Query number of transactions results per page returned")
 	cmd.Flags().String(flagEvents, "", fmt.Sprintf("list of transaction events in the form of %s", eventFormat))