[dhcp_server] test ip assignment with single and range ip configuration

[w1nda]

Description of PR

Summary:
This PR is part of test plan #11348 implementation

Type of change

• Bug fix
• Testbed and Framework(new/improvement)
• Test case(new/improvement)

Back port request

• 201911
• 202012
• 202205
• 202305
• 202311

Approach

What is the motivation for this PR?

To make sure dhcp server has the capability for usage.

How did you do it?

In this PR,
first, we write common function to construct DHCP packet, parse VLAN configuration, parse port mapping and send packet and verify packet.
second, we add cases for ip assignment with single ip configuration.
last, we add case for ip assignment with range ip configuration.

How did you verify/test it?

Run tests on Arista-720DT-G48S4 and Nokia-7215 mx topo.

Any platform specific information?

Supported testbed topology if it's a new test case?

Documentation

[w1nda]

Hi @wangxin, cloud you help merge this PR?

[mssonicbld]

The pre-commit check detected issues in the files touched by this pull request.
The pre-commit check is a mandatory check, please fix detected issues.

Detailed pre-commit check results:
trim trailing whitespace.................................................Passed
fix end of files.........................................................Passed
check yaml...........................................(no files to check)Skipped
check for added large files..............................................Passed
check python ast.........................................................Passed
flake8...................................................................Failed
- hook id: flake8
- exit code: 1

tests/dhcp_server/test_dhcp_server.py:134:30: F821 undefined name 'json'

flake8...............................................(no files to check)Skipped
check conditional mark sort..........................(no files to check)Skipped

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