Ajust the outputs of gen_base58_test_vectors.py to current test format.
1. Add bech32 vector generation.
2. Add Script-fragments to hexrepr in the format expected by the test.
3. Modify the metadata.
1) Change 'isTestnet' to 'chain' (main/test/regtest)
2) Remove 'addrType'
3) Add 'tryCaseFlip' (True/False on bech32)
