Update Telemetry.Agent to aws-opentelemetry-collector in ApplicationSignals Processor

[jj22ee]

Description:

Update Telemetry.Agent to aws-opentelemetry-collector in ApplicationSignals Processor

Link to tracking Issue:

Testing:

Tested with ADOT JS SDK Sample App and OCB Collector running locally to generate EMF metric:

(The version v0.103.0 is the version of go.opentelemetry.io/collector module)

"Telemetry.Agent": "aws-opentelemetry-collector/v0.103.0"

{
    "Environment": "generic:default",
    "Host": "<(removed_host_name)>",
    "Operation": "GET /http",
    "PlatformType": "Generic",
    "Service": "example-application-service-name",
    "Telemetry.Agent": "aws-opentelemetry-collector/v0.103.0",
    "Telemetry.SDK": "opentelemetry,0.3.0-dev0-aws,nodejs,Auto",
    "Telemetry.Source": "LocalRootSpan",
    "Version": "1",
    "_aws": {
        "CloudWatchMetrics": [

    ...

Documentation: