Adding native otel logs collection for windows nodes

[nitaliya]

Native logs support on windows k8s nodes
Ticket: OTL-1349

Changes:

• Updating filelog path and regex to parse windows $$attributes["file.path"]
• Not creating initContainers in case of windows k8s nodes, because fluentd logging agent is not supported on a windows node
• Mounting C:/ProgramData of the host as var-lib-docker-containers in case of windows k8s nodes

Testing outcome:
For testing, I have used the following values.yaml input file to Otel helm chart

clusterName: nimesh-windows-cluster
splunkObservability:
  realm: <SPLUNK_REALM>
  accessToken: <SPLUNK_ACCESS_TOKEN>
  logsEnabled: true

image:
  otelcol:
    repository: quay.io/signalfx/splunk-otel-collector-windows-dev

logsEngine: "otel"
readinessProbe:
  initialDelaySeconds: 60
livenessProbe:
  initialDelaySeconds: 60

isWindows: true

agent:
  config:
    exporters:
      logging:
        loglevel: debug
    service:
      pipelines:
        logs:
          exporters: [ logging, splunk_hec/o11y ]

to generate a log I have created a sample deployment to print random numbers on the log file.

Output:
Console log of otel-collector agent.

Splunk Log Observer.

[dmitryax]

LGTM. Thanks!