enhancement(prometheus_remote_write sink): Add acknowledgements support

[bruceg]

As far as I can tell, this sink actually has support present, but not enableable
with any configuration.

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[github-actions]

Soak Test Results

Baseline: 3b0f45c
Comparison: 7c7ff5b
Total Vector CPUs: 4

Explanation

A soak test is an integrated performance test for vector in a repeatable rig, with varying configuration for vector. What follows is a statistical summary of a brief vector run for each configuration across SHAs given above. The goal of these tests are to determine, quickly, if vector performance is changed and to what degree by a pull request. Where appropriate units are scaled per-core.

The table below, if present, lists those experiments that have experienced a statistically significant change in their throughput performance between baseline and comparision SHAs, with 90.0% confidence OR have been detected as newly erratic. Negative values mean that baseline is faster, positive comparison. Results that do not exhibit more than a ±8.87% change in mean throughput are discarded. An experiment is erratic if its coefficient of variation is greater than 0.3. The abbreviated table will be omitted if no interesting changes are observed.

No interesting changes in throughput with confidence ≥ 90.00% and absolute Δ mean >= ±8.87%:

Fine details of change detection per experiment.

experiment	Δ mean	Δ mean %	confidence	baseline mean	baseline stdev	baseline stderr	baseline outlier %	baseline CoV	comparison mean	comparison stdev	comparison stderr	comparison outlier %	comparison CoV	erratic	declared erratic
http_to_http_acks	247.65KiB	1.35	69.30%	17.97MiB	8.64MiB	180.63KiB	0	0.480627	18.21MiB	7.74MiB	161.63KiB	0	0.425071	True	True
syslog_loki	56.61KiB	0.4	99.19%	13.94MiB	626.02KiB	12.81KiB	0	0.0438498	13.99MiB	841.8KiB	17.11KiB	0	0.0587316	False	False
splunk_hec_route_s3	74.56KiB	0.38	74.61%	18.99MiB	2.26MiB	47.03KiB	0	0.118821	19.07MiB	2.17MiB	45.37KiB	0	0.113653	False	False
splunk_hec_indexer_ack_blackhole	18.42KiB	0.08	58.28%	23.75MiB	817.39KiB	16.62KiB	0	0.0336041	23.77MiB	759.68KiB	15.46KiB	0	0.031208	False	False
splunk_hec_to_splunk_hec_logs_noack	15.54KiB	0.06	81.49%	23.82MiB	469.81KiB	9.58KiB	0	0.0192554	23.84MiB	330.84KiB	6.75KiB	0	0.0135508	False	False
datadog_agent_remap_datadog_logs_acks	17.18KiB	0.03	10.17%	61.8MiB	3.95MiB	82.67KiB	0	0.0639531	61.82MiB	5.09MiB	105.95KiB	0	0.0823216	False	False
socket_to_socket_blackhole	-2.68KiB	-0.01	41.21%	23.21MiB	158.66KiB	3.24KiB	0	0.00667327	23.21MiB	182.69KiB	3.73KiB	0	0.00768488	False	False
enterprise_http_to_http	-2.19KiB	-0.01	23.79%	23.85MiB	246.34KiB	5.03KiB	0	0.0100857	23.84MiB	255.22KiB	5.22KiB	0	0.0104503	False	False
http_text_to_http_json	-13.7KiB	-0.03	33.71%	39.07MiB	912.03KiB	18.62KiB	0	0.0227902	39.06MiB	1.21MiB	25.32KiB	0	0.0309946	False	False
file_to_blackhole	-45.85KiB	-0.05	30.26%	95.33MiB	3.82MiB	79.18KiB	0	0.0400549	95.29MiB	4.2MiB	87.39KiB	0	0.0440776	False	False
splunk_hec_to_splunk_hec_logs_acks	-13.68KiB	-0.06	45.29%	23.78MiB	745.31KiB	15.18KiB	0	0.0306067	23.76MiB	830.87KiB	16.91KiB	0	0.0341395	False	False
http_to_http_json	-26.45KiB	-0.11	97.12%	23.85MiB	343.71KiB	7.02KiB	0	0.0140727	23.82MiB	481.82KiB	9.85KiB	0	0.0197488	False	False
http_pipelines_blackhole	-3.77KiB	-0.23	94.52%	1.61MiB	16.98KiB	355.56B	0	0.0102693	1.61MiB	94.69KiB	1.93KiB	0	0.0573927	False	False
http_to_http_noack	-69.62KiB	-0.29	99.96%	23.85MiB	244.32KiB	5.0KiB	0	0.0100037	23.78MiB	936.09KiB	19.08KiB	0	0.0384376	False	False
syslog_splunk_hec_logs	-78.21KiB	-0.46	99.96%	16.47MiB	798.93KiB	16.26KiB	0	0.0473475	16.4MiB	736.95KiB	15.02KiB	0	0.0438776	False	False
fluent_elasticsearch	-414.4KiB	-0.51	100.00%	79.47MiB	55.72KiB	1.12KiB	0	0.000684597	79.07MiB	4.21MiB	86.53KiB	0	0.0532888	False	False
syslog_log2metric_humio_metrics	-98.89KiB	-0.73	100.00%	13.18MiB	341.19KiB	6.97KiB	0	0.0252666	13.09MiB	552.7KiB	11.25KiB	0	0.0412318	False	False
syslog_humio_logs	-138.06KiB	-0.78	100.00%	17.22MiB	147.6KiB	3.01KiB	0	0.00836977	17.08MiB	123.19KiB	2.52KiB	0	0.00704064	False	False
http_pipelines_no_grok_blackhole	-93.91KiB	-0.81	99.99%	11.37MiB	33.02KiB	690.24B	0	0.00283619	11.27MiB	1.12MiB	23.31KiB	0	0.0992792	False	False
syslog_log2metric_splunk_hec_metrics	-174.17KiB	-0.94	100.00%	18.06MiB	803.01KiB	16.36KiB	0	0.0434124	17.89MiB	923.02KiB	18.79KiB	0	0.0503749	False	False
syslog_regex_logs2metric_ddmetrics	-131.46KiB	-1	100.00%	12.78MiB	684.56KiB	13.94KiB	0	0.0522885	12.65MiB	568.53KiB	11.59KiB	0	0.0438668	False	False
datadog_agent_remap_blackhole_acks	-1.0MiB	-1.56	100.00%	64.23MiB	4.15MiB	86.52KiB	0	0.0646486	63.23MiB	4.55MiB	95.25KiB	0	0.0720097	False	False
datadog_agent_remap_blackhole	-1.0MiB	-1.6	100.00%	62.9MiB	4.54MiB	94.65KiB	0	0.0721948	61.9MiB	4.82MiB	100.55KiB	0	0.077863	False	False
http_pipelines_blackhole_acks	-22.17KiB	-1.83	100.00%	1.18MiB	103.01KiB	2.1KiB	0	0.0849646	1.16MiB	94.69KiB	1.93KiB	0	0.0795624	False	False
datadog_agent_remap_datadog_logs	-1.21MiB	-1.88	100.00%	64.33MiB	1.46MiB	30.58KiB	0	0.0226797	63.11MiB	4.79MiB	99.75KiB	0	0.0758991	False	False

[spencergilbert]

👍 that was my feeling as well