Supported instance lists on aws_instance should be more easier to maintain

[syuu1228]

Currently, we have such code on aws_instance:

    def is_supported_instance_class(self):
        if self.instance_class() in ['i2', 'i3', 'i3en', 'c5d', 'm5d', 'm5ad', 'r5d', 'z1d', 'c6gd', 'm6gd', 'r6gd', 'x2gd', 'im4gn', 'is4gen', 'i4i', 'i4g', 'i7ie']:
            return True
        return False

    def is_dev_instance_type(self):
        if self.instancetype in ['t3.micro']:
            return True
        return False

    def get_en_interface_type(self):
        instance_class = self.instance_class()
        instance_size = self.instance_size()
        if instance_class in ['c3', 'c4', 'd2', 'i2', 'r3']:
            return 'ixgbevf'
        if instance_class in ['a1', 'c5', 'c5a', 'c5d', 'c5n', 'c6g', 'c6gd', 'f1', 'g3', 'g4', 'h1', 'i3', 'i3en', 'inf1', 'm5', 'm5a', 'm5ad', 'm5d', 'm5dn', 'm5n', 'm6g', 'm6gd', 'p2', 'p3', 'r4', 'r5', 'r5a', 'r5ad', 'r5b', 'r5d', 'r5dn', 'r5n', 't3', 't3a', 'u-6tb1', 'u-9tb1', 'u-12tb1', 'u-18tn1', 'u-24tb1', 'x1', 'x1e', 'z1d', 'c6g', 'c6gd', 'm6g', 'm6gd', 't4g', 'r6g', 'r6gd', 'x2gd', 'im4gn', 'is4gen', 'i4i', 'i4g', 'i7ie']:
            return 'ena'
        if instance_class == 'm4':
            if instance_size == '16xlarge':
                return 'ena'
            else:
                return 'ixgbevf'
        return None

This can be easy to inconsistent with aws_io_params.yaml.
I guess is_supported_instance_class() is identical as node list on aws_io_params.yaml, we can refer the yaml file not manually define the list.
We cannot do same on get_en_interface_type(), but I suppose we actually don't need this.
It is only referenced from scylla_ec2_check, and it wants to verify enhanced network is enabled or not.
To do so, we probably just need to compare NIC driver like this:

    if nic_driver == 'ena' || nic_driver == 'ixgbevf':
        en = True
   else:
       en=False
   if not en:
       print('{nic_name} doesn't supported enhanced networking!')

So we actually no need to have instance type list here.

is_dev_instance_type() is special, it should be not listed on aws_io_params.yaml so we have to keep it.