feat(observability): update component_discarded_events_total for apache_metrics source

[neuronull]

Closes: #14053.

part of #13995.

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Soak Test Results

Baseline: 8e2201b
Comparison: 9e42c62
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_pipelines_blackhole_acks	22.35KiB	1.87	100.00%	1.17MiB	134.7KiB	2.74KiB	0	0.112719	1.19MiB	96.34KiB	1.96KiB	0	0.0791391	False	False
datadog_agent_remap_blackhole_acks	820.74KiB	1.31	100.00%	61.22MiB	4.4MiB	91.65KiB	0	0.0718952	62.02MiB	3.01MiB	62.87KiB	0	0.0484588	False	False
syslog_log2metric_splunk_hec_metrics	147.29KiB	0.84	100.00%	17.13MiB	635.47KiB	12.96KiB	0	0.0362279	17.27MiB	947.66KiB	19.28KiB	0	0.053576	False	False
syslog_splunk_hec_logs	139.09KiB	0.83	100.00%	16.29MiB	784.74KiB	15.97KiB	0	0.0470294	16.43MiB	713.46KiB	14.52KiB	0	0.0424037	False	False
syslog_humio_logs	95.33KiB	0.58	100.00%	16.03MiB	442.3KiB	9.03KiB	0	0.026942	16.12MiB	435.6KiB	8.92KiB	0	0.0263809	False	False
datadog_agent_remap_blackhole	251.31KiB	0.39	97.29%	63.0MiB	4.16MiB	86.76KiB	0	0.066077	63.24MiB	3.52MiB	73.49KiB	0	0.0557229	False	False
splunk_hec_route_s3	64.42KiB	0.35	64.57%	18.18MiB	2.37MiB	49.37KiB	0	0.130397	18.25MiB	2.34MiB	48.97KiB	0	0.128238	False	False
http_pipelines_blackhole	2.33KiB	0.14	43.96%	1.61MiB	108.22KiB	2.21KiB	0	0.0657472	1.61MiB	163.4KiB	3.33KiB	0	0.0991259	False	False
splunk_hec_to_splunk_hec_logs_noack	15.87KiB	0.07	82.88%	23.82MiB	462.84KiB	9.45KiB	0	0.0189699	23.84MiB	329.28KiB	6.72KiB	0	0.013487	False	False
splunk_hec_indexer_ack_blackhole	3.32KiB	0.01	11.43%	23.76MiB	803.94KiB	16.36KiB	0	0.0330309	23.77MiB	799.86KiB	16.28KiB	0	0.0328587	False	False
enterprise_http_to_http	-4.15KiB	-0.02	42.24%	23.85MiB	258.19KiB	5.27KiB	0	0.0105706	23.84MiB	257.46KiB	5.27KiB	0	0.0105425	False	False
file_to_blackhole	-65.55KiB	-0.07	37.49%	95.28MiB	4.11MiB	85.07KiB	0	0.0431464	95.22MiB	5.0MiB	103.73KiB	0	0.0524632	False	False
splunk_hec_to_splunk_hec_logs_acks	-21.85KiB	-0.09	61.92%	23.76MiB	823.55KiB	16.76KiB	0	0.0338421	23.74MiB	907.88KiB	18.46KiB	0	0.037341	False	False
http_to_http_json	-28.26KiB	-0.12	97.83%	23.85MiB	343.38KiB	7.01KiB	0	0.01406	23.82MiB	494.75KiB	10.11KiB	0	0.0202815	False	False
socket_to_socket_blackhole	-34.07KiB	-0.15	96.92%	22.68MiB	608.08KiB	12.41KiB	0	0.0261754	22.65MiB	476.43KiB	9.73KiB	0	0.0205389	False	False
http_to_http_noack	-43.25KiB	-0.18	99.19%	23.85MiB	257.37KiB	5.26KiB	0	0.0105379	23.8MiB	758.03KiB	15.46KiB	0	0.0310925	False	False
syslog_regex_logs2metric_ddmetrics	-43.28KiB	-0.34	97.87%	12.27MiB	629.61KiB	12.84KiB	0	0.0500998	12.23MiB	673.0KiB	13.71KiB	0	0.0537375	False	False
syslog_loki	-76.28KiB	-0.5	100.00%	14.85MiB	310.6KiB	6.36KiB	0	0.0204201	14.78MiB	746.43KiB	15.17KiB	0	0.0493204	False	False
fluent_elasticsearch	-472.17KiB	-0.58	100.00%	79.47MiB	53.05KiB	1.07KiB	0	0.00065171	79.01MiB	4.73MiB	97.06KiB	0	0.0598121	False	False
datadog_agent_remap_datadog_logs_acks	-477.1KiB	-0.75	99.94%	61.77MiB	4.2MiB	87.71KiB	0	0.0679167	61.3MiB	5.14MiB	106.92KiB	0	0.0837717	False	False
http_to_http_acks	-140.5KiB	-0.8	45.63%	17.18MiB	7.85MiB	164.18KiB	0	0.457122	17.04MiB	7.82MiB	163.0KiB	0	0.458638	True	True
http_text_to_http_json	-361.34KiB	-0.89	100.00%	39.8MiB	904.13KiB	18.46KiB	0	0.0221808	39.45MiB	946.47KiB	19.32KiB	0	0.0234271	False	False
syslog_log2metric_humio_metrics	-175.8KiB	-1.33	100.00%	12.94MiB	178.84KiB	3.65KiB	0	0.0134903	12.77MiB	548.28KiB	11.16KiB	0	0.0419143	False	False
http_pipelines_no_grok_blackhole	-177.3KiB	-1.62	100.00%	10.7MiB	347.4KiB	7.09KiB	0	0.0317121	10.52MiB	1.05MiB	21.93KiB	0	0.100032	False	False
datadog_agent_remap_datadog_logs	-2.19MiB	-3.58	100.00%	61.12MiB	2.07MiB	43.38KiB	0	0.0338601	58.93MiB	4.33MiB	90.27KiB	0	0.0735406	False	False