feat(client,simapp): inject keyring in autocli opts

[julienrbrt]

Description

ref: #17107
follow-up of #17308

Let SDK keyring implement the clientv2 keyring interface.
This allows to use the keyring in all commands in autocli by apps built by the SDK.
The same will be done for Hubl in #17107.

Changes:

Before:

$ simd q bank balances cosmos1gaa77tmlsr5qkkfl0uxk4z6lwdjgwzg2dzfada
$ simd q bank balances $(simd keys show alice -a)
$ simd tx bank send alice $(simd keys show bob -a) 1000stake

After:

$ simd q bank balances cosmos1gaa77tmlsr5qkkfl0uxk4z6lwdjgwzg2dzfada
$ simd q bank balances alice
$ simd tx bank send alice bob 1000stake # eventually migrated to autocli

And this in any commands.

Note, the only drawback is that it is not possible to overwrite the keyring with command flags, only the client.toml is read for now.

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[tac0turtle]

two comments otherwise looks good