fix: Display actual values for WireGuard site credentials

[Fredkiss3]

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Summary

Changes:

• Show the actual values from the DB in wireguard site credentials
• Also made it so that the public key in wireguard site credentials is obfuscated
• Bug fix: When regenerating credentials for sites using wireguard, the public key shown always abc123 instead the actual generated public key

fixes #2341

Screenshots

Name	Screenshots
Obfuscated wireguard credentials
Obfuscated wireguard credentials (in DB)
Regenerated public key before
Regenerated public key after