Add support for end-to-end acknowledgement in all relevant sinks

[bruceg]

This is a meta-issue describing the status of adding initial support for end-to-end acknowledgement to all sources.

Sink	Priority	Status	Issue
aws_cloudwatch_logs	P1
aws_cloudwatch_metrics	P1
aws_kinesis_firehose	P1
aws_kinesis_streams	P1
aws_s3	P0	Done	#7536
aws_sqs	P1
azure_monitor_logs	P2	Done	#7411
blackhole	P2
clickhouse	P1	Done	#7411
console	P2
datadog_logs	P0	Done	#7354
datadog_metrics	P0	Done	#7520
elasticsearch	P0		#7448
file	P2
fluent	P2		#7533
gcp_cloud_storage	P1
gcp_pubsub	P2	Done	#7411
gcp_stackdriver_logs	P1	Done	#7411
gcp_stackdriver_metrics	P2
honeycomb	P3	Done	#7411
http	P0	Done	#7265
humio_logs	P2
humio_metrics	P2
influxdb_logs	P2	Done	#7411
influxdb_metrics	P2
kafka	P0
logdna	P3	Done	#7411
loki	P2	Done	#7411
nats	P2
new_relic_logs	P2
papertrail	P2
prometheus_exporter	-
prometheus_remote_write	P1
pulsar	P2
sematext_logs	P2
sematext_metrics	P2
socket	P1
splunk_hec	P0	Done	#7411
statsd	P2
vector	P0	Done	#7625

[bruceg]

This has been broken down to individual issues as linked above.