Generate key_io_valid.json file with valid key data

[van-orton]

Description

src/test/data/key_io_valid.json contains data for keys and this is validated during the unit test execution.
Because of the new address prefix (bgl1 instead of bc1) this file has to be regenerated for this tests section to pass.
The test section is commented out and located in src/test/key_io_tests.cpp

Solution direction

• Check test sections in key_io_tests.cpp;
• Build and run unit test executable and see the section failing;
• Create a dataset that will pass the test (there are various online tools for btc, command-line BGL-cli has same arguments as bitcoin-cli to generate addresses and dump keys, etc.)
• Fix key data that can be fixed, include new testing data if removed some to keep test robust enough;

Acceptance criteria

• key_io_tests.cpp is running tests properly with new data in json file;
• there are numerous test cases defined in the json file (maybe fewer than in original one, but not by order of magnitude);

[gitcoinbot]

Issue Status: 1. Open 2. Started 3. Submitted 4. Done

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[gitcoinbot]

Issue Status: 1. Open 2. Started 3. Submitted 4. Done

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Work has been started.

These users each claimed they can complete the work by 266 years, 1 month from now.
Please review their action plans below:

1) janus has been approved to start work.

This task is challenging and interesting, I would use it to advance my understanding of BTC and BGL. I would complete this task in days.

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[gitcoinbot]

Issue Status: 1. Open 2. Started 3. Submitted 4. Done

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Work for 1.0432 ETH (384.64 USD @ $369.85/ETH) has been submitted by:

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