Adding support for YAML support for CloudWatchAgent

[mitali-salvi]

Issue #, if available:

Description of changes:

1. Add otelConfig field to the AmazonCloudWatchAgent CRD
2. Add new data to the existing cloudwatch-agent config-map with the contents of otelConfig
3. Mount the config map onto the agent container.

Testing
With the YAML passed to the agent ---

cwagentconfig.json:                                                                                                                                                          │
│ ----                                                                                                                                                                         │
│ {"agent":{"region":"us-west-2"},"logs":{"metrics_collected":{"application_signals":{"hosted_in":"my-dev-cluster"},"kubernetes":{"cluster_name":"my-dev-cluster","enhanced_co │
│ ntainer_insights":true}}},"traces":{"traces_collected":{"application_signals":{}}}}                                                                                          │
│ cwagentotelconfig.yaml:                                                                                                                                                      │
│ ----                                                                                                                                                                         │
│ exporters:                                                                                                                                                                   │
│   awsxray:                                                                                                                                                                   │
│     region: us-west-2                                                                                                                                                        │
│ processors:                                                                                                                                                                  │
│   batch: null                                                                                                                                                                │
│ receivers:                                                                                                                                                                   │
│   otlp:                                                                                                                                                                      │
│     protocols:                                                                                                                                                               │
│       grpc:                                                                                                                                                                  │
│         endpoint: 0.0.0.0:4317                                                                                                                                               │
│       http:                                                                                                                                                                  │
│         endpoint: 0.0.0.0:4318                                                                                                                                               │
│ service:                                                                                                                                                                     │
│   pipelines:                                                                                                                                                                 │
│     traces/xray:                                                                                                                                                             │
│       exporters:                                                                                                                                                             │
│       - awsxray                                                                                                                                                              │
│       processors:                                                                                                                                                            │
│       - batch                                                                                                                                                                │
│       receivers:                                                                                                                                                             │
│       - otlp      

When the YAML is deleted from the custom resource, the reconciler will delete the config-map data entry and volume mount item

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