Fluentbit improvements

[bonclay7]

What does this PR do?

Cleans up log format for logs collected by FluentBit

Before:

{
    "log": "2023-06-23T12:25:48.21020769Z stderr F 2023-06-23T12:25:48.210Z\tinfo\tMetricsExporter\t{\"kind\": \"exporter\", \"data_type\": \"metrics\", \"name\": \"logging\", \"resource metrics\": 1, \"metrics\": 336, \"data points\": 866}",
    "kubernetes": {
        "pod_name": "adot-collector-67ddcff9d8-phwpj",
        "namespace_name": "adot-collector-kubeprometheus",
        "pod_id": "a6265b55-e0f1-446d-94a3-36fe02c2d05f",
        "labels": {
            "app.kubernetes.io/component": "opentelemetry-collector",
            "app.kubernetes.io/instance": "adot-collector-kubeprometheus.adot",
            "app.kubernetes.io/managed-by": "opentelemetry-operator",
            "app.kubernetes.io/name": "adot-collector",
            "app.kubernetes.io/part-of": "opentelemetry",
            "app.kubernetes.io/version": "latest",
            "pod-template-hash": "67ddcff9d8"
        },
        "annotations": {
            "opentelemetry-operator-config/sha256": "86cffa06e194ca52e19c880e5e4dd8e5f0da8275e407a9c93d91cae1254fe772"
        },
        "host": "ip-10-0-10-151.eu-central-1.compute.internal",
        "container_name": "otc-container",
        "docker_id": "0561f678444c7ba55acc3e47735c620ca81c907a1708fe75f39794a784465e4b",
        "container_image": "public.ecr.aws/aws-observability/aws-otel-collector:v0.29.1"
    }
}

After:

2023-07-07T14:45:09.178Z	info	MetricsExporter	{
    "kind": "exporter",
    "data_type": "metrics",
    "name": "logging",
    "resource metrics": 1,
    "metrics": 16,
    "data points": 1206
}

Motivation

• Removes stdout infos and k8s log attributes
• "Attempts" at parsing multi log line from fluentBit native multiline parsers

More

• Yes, I have tested the PR using my local account setup (Provide any test evidence report under Additional Notes)
• Yes, I ran pre-commit run -a with this PR
• Yes, I have added a new example under examples to support my PR (when applicable)
• Yes, I have updated the Pages for this feature

Note: Not all the PRs required examples and docs.

[bonclay7]

@lewinkedrs need your opinion on this

[elamaran11]

LGTM

[lewinkedrs]

Approved!