docs(examples/cbdc): fix mismatch of fabric identities

[AndreAugusto11]

• What I believe has been an update to the Fabric SDK has led the application to break due to having the Fabric identities hardcoded (for the Fabric-Ethereum ID mapping). This was first noted in docs(examples/cbdc): fix successful minting on chaincode results in balance 0 #2739.
• An initial fix was deployed in docs(examples/cbdc): fix mismatch of Fabric identities in GET and POST requests #2802 but only the Mint function was changed, which caused other functions to be breaking at the moment (e.g., Escrow)
• This commit changes the crypto material files and reverts the workaround in PR docs(examples/cbdc): fix mismatch of Fabric identities in GET and POST requests #2802
• The crypto material is only used for testing and to show information in the frontend (e.g., requesting the balance of a specific user based on the identity)
• For critical operations, access control is being performed by the chaincode by using the call at the begining of the relevant methods

Fixes #2914

[petermetz]

@AndreAugusto11 LGTM on the big picture. Please do the following though:

1. Delete the package-lock.json - it is redundant with the yarn.lock file
2. Update the commit message to contain all the information that you also put in the PR description - I noticed that the Fixes #???? declaration is missing from the commit message. Other stuff might be missing too, didn't check too thoroughly

[AndreAugusto11]

@AndreAugusto11 LGTM on the big picture. Please do the following though:

1. Delete the package-lock.json - it is redundant with the yarn.lock file
2. Update the commit message to contain all the information that you also put in the PR description - I noticed that the Fixes #???? declaration is missing from the commit message. Other stuff might be missing too, didn't check too thoroughly

@petermetz Done, thank you!

[petermetz]

@AndreAugusto11 Thank you for the updates! Sorry to just come up with this one, but there's also the issue that the GUI is crashing when I try to test it locally (not with the GUI container image):

[izuru0]

LGTM