Wrong IBAN formatting for Costa Rica

[MrGussio]

Describe the bug

@halvorv and I discovered an error in the generation of Costa Rican IBAN codes. According to multiple sources we have found online (here and here for example), a Costa Rican IBAN code should consist of in total 22 characters, following the structure like this:
CR99 0000 0000 0000 8888 88

• first two characters are CR
• two digit checksum
• one reserved character
• three digit bank code
• fourteen digit account number

This totals up to 22 characters in total. However, in Faker, it is currently defined like this:

{
      country: 'CR',
      total: 21,
      bban: [
        {
          type: 'n',
          count: 3,
        },
        {
          type: 'n',
          count: 14,
        },
      ],
      format: 'CRkk bbbc cccc cccc cccc c',
    },

According to this source, we can include that one reserved character within the bank code.

Hence, the first object in the bban array should be defined with a count of 4 instead of 3, the total should become 22 and the formatting should become CRkk bbbb cccc cccc cccc cc

Reproduction

Generate an IBAN number for Costa Rica and it will generate an invalid one:

faker.finance.iban(false, 'CR')

Additional Info

No response