[META] Update all instances of admin:admin across different repositories

[DarshitChanpura]

Description

There are many instances of admin:admin credentials usage across different repositories. They will be affected by the change to replace hard-coded admin password with a dynamic value. This issue requests fixing all those instances of admin credentials to address this breaking change.

Acceptance Criteria

• All hard-coded instances across repos are addressed
• Ensure that tests, if any, work as expected

Tasks

Search and update the references to admin:admin, password admin and demo install script in following repos, as required:
(to track work done, tag the PR next to the repo name)

(Legend: ❌ - no updates, 🕐 - in progress, ⏳ - Waiting 2.12 release, ✅ - complete)

Status	Repo	PR	Issue	Notes
⏳	logstash-output-opensearch	#233	#234	will be merged post 2.12 release
⏳	opensearch-benchmark	#430	#474	will be merged post 2.12 release
⏳	opensearch-go	#449	#459	will be merged post 2.12 release
⏳	opensearch-js	#669, #707	#699	will be merged post 2.12 release
⏳	opensearch-migrations	#480	#479	will be merged post 2.12 release
⏳	opensearch-py	#631	#648	will be merged post 2.12 release
⏳	opensearch-rs	#234	#236	will be merged post 2.12 release
⏳	opensearch-ruby	#217	#222	will be merged post 2.12 release
⏳	reporting-cli	#56	#58	will be merged post 2.12 release
⏳	terraform-provider-opensearch	#138	#146	will be merged post 2.12 release

Status	Repo	PR	Issue	Notes
✅	alerting	#1399	#1347
✅	alerting-dashboards-plugin	#849	#861
✅	anomaly-detection	#1134	#1120
✅	anomaly-detection-dashboards-plugin		#662	no action needed
✅	asynchronous-search	#521	#515
✅	common-utils	#581	#579
✅	cross-cluster-replication	#1298	#1310
✅	custom-codecs		#92	no action needed
✅	data-prepper	#3869	#3978
✅	dashboards-observability	#1296	#1371
✅	dashboards-visualizations		#308	no action needed
✅	docker-images			archived
✅	documentation-website	#5887, #6058, #6279	#5946
✅	flow-framework		#310	no action needed
✅	geospatial	#616	#615
✅	helm-charts	#518	#515
✅	index-management	#1076	#1064
✅	index-management-dashboards-plugin	#954	#957
✅	job-scheduler		#553	no action needed
✅	k-NN	#1415	#1359
✅	logstash-input-opensearch	#55	#56
✅	ml-commons		#1899	no action needed
✅	ml-commons-dashboards		#292
✅	neural-search	#551	#550
✅	notifications		#832	no action needed
✅	opensearch-build	#4302	#4303
✅	opensearch-cluster-cdk	#86
✅	OpenSearch-Dashboards	#5736	#5636
✅	opensearch-dashboards-functional-test	#981
✅	opensearch-k8s-operator	#692	#703	no action neede
✅	opensearch-net	#480	#520
✅	opensearch-net-abstractions			archived
✅	opensearch-php		#172	no action needed
✅	opensearch-py-ml	#365	#371
✅	opentelemetry-demo	#114	#113
✅	performance-analyzer		#613	no action needed
✅	performance-analyzer-rca	#526	#527
✅	reporting		#938	no action needed
✅	search-processor	#214	#216
✅	security	#3844
✅	security-analytics	#832	#831
✅	security-dashboards-plugin	#1696
✅	sql-cli	#25	#26
✅	sql-odbc		#65	no action needed

[stephen-crawford]

[Triage] This is a meta tracking issue for replacing default credential usage in the cluster.

[derek-ho]

Relevant line in opensearch-build repo: https://github.com/opensearch-project/opensearch-build/blob/main/scripts/default/integtest.sh#L92

[derek-ho]

CI references to admin:admin :https://github.com/search?q=org%3Aopensearch-project+admin%3Aadmin&type=code&p=1

[derek-ho]

https://github.com/search?q=org%3Aopensearch-project+admin%3Aadmin+repo%3Aopensearch-project%2Fopensearch-js&type=code&p=1, solved by: opensearch-project/opensearch-js#669

[derek-ho]

opensearch-project/alerting-dashboards-plugin#849

[derek-ho]

opensearch-project/index-management-dashboards-plugin#954

[dlvenable]

What version of OpenSearch will have the new password? Data Prepper actually has quite a few occurrences of the password admin. Search for password=admin, password: admin, password: "admin".