feat: Support Azure Traffic Manager Profiles

[amirschw]

Picking this up from where the original author left off

When implementing a new scraper; these tasks are completed:

• [x] Implement configuration
• [x] Implement validation
• [x] Implement scraping
• [x] Implement resource discovery
• [x] Provide unit tests
• [x] Test end-to-end
• [x] Document scraper (see https://github.com/promitor/docs/blob/main/CONTRIBUTING.md#documenting-a-new-scraper)
• [x] Add entry to changelog (see https://github.com/tomkerkhove/promitor/blob/master/CONTRIBUTING.md#changelog)

Metrics output:

# TYPE azure_traffic_manager_endpoint_qps gauge
# HELP azure_traffic_manager_endpoint_qps Number of times a Traffic Manager endpoint was returned in the given time frame
azure_traffic_manager_endpoint_qps{tenant_id="<tenant_id>",subscription_id="<subscription_id>",resource_uri="<resource_uri>",resource_group="<resource_group>",instance_name="<instance_name>",geo="china",environment="dev"} 1781 1679494981881

Discovery output:

{"MetricName": "Discovered Resources", "MetricValue": 15, "Timestamp": "2023-03-22T14:20:38.6195166 +00:00", "Context": {"ResourceType": "TrafficManager", "CollectionName": "traffic-managers", "TelemetryType": "Metrics"}, "$type": "MetricLogEntry"}

Fixes #2192 Fixed #376 Related to #2194

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[tomkerkhove]

/azp run "Promitor CI - Scraper Agent"

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[tomkerkhove]

/azp run Promitor CI - Scraper Agent

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