feat(iota)!: show publicBase64Key without flag in keytool show

[Thoralf-M]

Description of change

base64 encode public key without the type flag byte in the keytool show command so it's easier to compare against the data in the validator info (there it's also without the flag byte encoded).

This change affects CommandOutput::{Export, Generate, Import, List, Show}

Links to any relevant issues

Fixes #4311

Type of change

• Breaking change (fix or feature that would cause existing functionality to not work as expected)

How the change has been tested

Added test and checked manually by running the command:

iota keytool show 0x5f60f23c01486c6af8540144cf9fa74c167257b93c08fc33b74b8f173a885038.key
╭─────────────────┬──────────────────────────────────────────────────────────────────────╮
│ alias           │                                                                      │
│ iotaAddress     │  0x5f60f23c01486c6af8540144cf9fa74c167257b93c08fc33b74b8f173a885038  │
│ publicBase64Key │  svUb1I94/15y2k6LKaEWqNLFf1rNMHq0hcWFAJynu0g=                        │
│ keyScheme       │  ed25519                                                             │
│ flag            │  0                                                                   │
│ peerId          │  b2f51bd48f78ff5e72da4e8b29a116a8d2c57f5acd307ab485c585009ca7bb48    │
╰─────────────────┴──────────────────────────────────────────────────────────────────────╯

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