feat(anta): add test atomic results

[mtache]

Description

Add anta.result_manager.models.AtomicTestResult model.
Create a atomic_results field in anta.result_manager.models.TestResult model.

The exemple below is a serialisation of the atomic_results field:

            "atomic_results": [
                {
                    "result": "success",
                    "messages": [],
                    "description": "Host 10.0.0.1 (src: Management0, vrf: default, size: 100B, repeat: 2)",
                    "inputs": {"destination": "10.0.0.1", "source": "Management0", "vrf": "default", "repeat": 2, "size": 100, "df_bit": False},
                },
                {
                    "description": "Host 10.0.0.2 (src: Management0, vrf: default, size: 100B, repeat: 2)",
                    "inputs": {
                        "destination": "10.0.0.2",
                        "df_bit": False,
                        "repeat": 2,
                        "size": 100,
                        "source": "Management0",
                        "vrf": "default",
                    },
                    "messages": [],
                    "result": "success",
                },
            ]

Fixes #427

Checklist:

• My code follows the style guidelines of this project
• I have performed a self-review of my code
• I have run pre-commit for code linting and typing (pre-commit run)
• I have made corresponding changes to the documentation
• I have added tests that prove my fix is effective or that my feature works
• New and existing unit tests pass locally with my changes (tox -e testenv)
• Make the reports display atomic results

[codspeed-hq]

CodSpeed Performance Report

Merging #937 will degrade performances by 19.2%

_{Comparing mtache:issue-427 (de4be39) with main (0c32b83)}

Summary

❌ 4 regressions
✅ 4 untouched benchmarks

⚠️ Please fix the performance issues or acknowledge them on CodSpeed.

Benchmarks breakdown

	Benchmark	main	mtache:issue-427	Change
❌	test_anta_dry_run[1-device]	60.2 ms	70.9 ms	-14.97%
❌	test_anta_dry_run[2-devices]	106.4 ms	127.6 ms	-16.58%
❌	test_get_coroutines[1-device]	46.3 ms	57.1 ms	-18.93%
❌	test_get_coroutines[2-devices]	91.1 ms	112.8 ms	-19.2%

[sonarcloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
97.8% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud