NC | Virtual hosts configuration support

[romayalon]

Explain the changes

1. Endpoint.js - Replace the inline check of process.env.VIRTUAL_HOSTS to check config.VIRTUAL_HOSTS.

Issues: Fixed #xxx / Gap #xxx

1. Fixed NSFS | NC | add VIRTUAL_HOSTS to config (currently only in env) #7888

Testing Instructions:

1. Types Schema tests - sudo jest --testRegex=jest_tests/test_nc_nsfs_config_schema
2. Full Virtual manual tests -

• add domain name mapping to 127.0.0.1

sudo vi /etc/hosts
example - 
....
127.0.0.1        my.virtual.host.io my.virtual.host.bucket1.io

• start nsfs.js (NooBaa Non Containerized) -

sudo node src/cmd/nsfs.js --debug=5

• Set NooBaa's virtual host in config.json -

sudo vi /etc/noobaa.conf.d/config.json
...
{
"VIRTUAL_HOSTS": "my.virtual.host.io"
}

• Set S3 CLI configuration -

aws configure set default.s3.addressing_style virtual
alias s3='AWS_ACCESS_KEY_ID=<your_access_key> AWS_SECRET_ACCESS_KEY=<your_secret_key>  aws --endpoint https://my.virtual.host.io:6443 --no-verify-ssl s3'

• Call list objects on bucket1 and expect a valid response -

s3 ls s3://buck1

• Doc added/updated
• Tests added