Add DNS provider for Derak Cloud

[ldez]

• have a homogeneous design with the other providers
• pass the linter
• do go mod tidy
• add tests (units)
• add tests ("live")
• add a provider descriptor
• generate CLI help, documentation, and readme.
• be able to do: (and put the output of this command to a comment)

$ DERAK_API_KEY="xxxx" \
./lego --email [email protected] --dns derak --domains *.example.com --domains example.com -s https://acme-staging-v02.api.letsencrypt.org/directory run
2023/05/02 00:45:41 No key found for account [email protected]. Generating a P256 key.
2023/05/02 00:45:41 Saved key to /home/ldez/sources/go/src/github.com/go-acme/lego/dist/.lego/accounts/acme-staging-v02.api.letsencrypt.org/[email protected]/keys/[email protected]
2023/05/02 00:45:42 Please review the TOS at https://letsencrypt.org/documents/LE-SA-v1.3-September-21-2022.pdf
Do you accept the TOS? Y/n
y
2023/05/02 00:45:43 [INFO] acme: Registering account for [email protected]
!!!! HEADS UP !!!!

Your account credentials have been saved in your Let's Encrypt
configuration directory at "/home/ldez/sources/go/src/github.com/go-acme/lego/dist/.lego/accounts".

You should make a secure backup of this folder now. This
configuration directory will also contain certificates and
private keys obtained from Let's Encrypt so making regular
backups of this folder is ideal.
2023/05/02 00:45:44 [INFO] [*.example.com, example.com] acme: Obtaining bundled SAN certificate
2023/05/02 00:45:44 [INFO] [*.example.com] AuthURL: https://acme-staging-v02.api.letsencrypt.org/acme/authz-v3/6320263384
2023/05/02 00:45:44 [INFO] [example.com] AuthURL: https://acme-staging-v02.api.letsencrypt.org/acme/authz-v3/6320263394
2023/05/02 00:45:44 [INFO] [*.example.com] acme: use dns-01 solver
2023/05/02 00:45:44 [INFO] [example.com] acme: Could not find solver for: tls-alpn-01
2023/05/02 00:45:44 [INFO] [example.com] acme: Could not find solver for: http-01
2023/05/02 00:45:44 [INFO] [example.com] acme: use dns-01 solver
2023/05/02 00:45:44 [INFO] [*.example.com] acme: Preparing to solve DNS-01
2023/05/02 00:45:47 [INFO] [example.com] acme: Preparing to solve DNS-01
2023/05/02 00:45:50 [INFO] [*.example.com] acme: Trying to solve DNS-01
2023/05/02 00:45:50 [INFO] [*.example.com] acme: Checking DNS record propagation using [192.168.1.1:53 [2a02:842b:5a8:b601::1]:53]
2023/05/02 00:45:55 [INFO] Wait for propagation [timeout: 2m0s, interval: 5s]
2023/05/02 00:45:55 [INFO] [*.example.com] acme: Waiting for DNS record propagation.
2023/05/02 00:46:00 [INFO] [*.example.com] acme: Waiting for DNS record propagation.
2023/05/02 00:46:05 [INFO] [*.example.com] acme: Waiting for DNS record propagation.
2023/05/02 00:46:10 [INFO] [*.example.com] acme: Waiting for DNS record propagation.
2023/05/02 00:46:15 [INFO] [*.example.com] acme: Waiting for DNS record propagation.
2023/05/02 00:46:21 [INFO] [*.example.com] acme: Waiting for DNS record propagation.
2023/05/02 00:46:26 [INFO] [*.example.com] acme: Waiting for DNS record propagation.
2023/05/02 00:46:31 [INFO] [*.example.com] acme: Waiting for DNS record propagation.
2023/05/02 00:46:36 [INFO] [*.example.com] acme: Waiting for DNS record propagation.
2023/05/02 00:46:41 [INFO] [*.example.com] acme: Waiting for DNS record propagation.
2023/05/02 00:46:46 [INFO] [*.example.com] acme: Waiting for DNS record propagation.
2023/05/02 00:46:51 [INFO] [*.example.com] acme: Waiting for DNS record propagation.
2023/05/02 00:46:56 [INFO] [*.example.com] acme: Waiting for DNS record propagation.
2023/05/02 00:47:02 [INFO] [*.example.com] acme: Waiting for DNS record propagation.
2023/05/02 00:47:07 [INFO] [*.example.com] acme: Waiting for DNS record propagation.
2023/05/02 00:47:18 [INFO] [*.example.com] The server validated our request
2023/05/02 00:47:18 [INFO] [example.com] acme: Trying to solve DNS-01
2023/05/02 00:47:18 [INFO] [example.com] acme: Checking DNS record propagation using [192.168.1.1:53 [2a02:842b:5a8:b601::1]:53]
2023/05/02 00:47:23 [INFO] Wait for propagation [timeout: 2m0s, interval: 5s]
2023/05/02 00:47:28 [INFO] [example.com] The server validated our request
2023/05/02 00:47:28 [INFO] [*.example.com] acme: Cleaning DNS-01 challenge
2023/05/02 00:47:31 [INFO] [example.com] acme: Cleaning DNS-01 challenge
2023/05/02 00:47:34 [INFO] [*.example.com, example.com] acme: Validations succeeded; requesting certificates
2023/05/02 00:47:34 [INFO] Wait for certificate [timeout: 30s, interval: 500ms]
2023/05/02 00:47:35 [INFO] [*.example.com] Server responded with a certificate.

Note the wildcard domain is important.

Closes #1872

[dmke]

Do you want to incorporate providers/dns/internal/errutils from #1868?

Otherwise, LGTM.