Update maven publication to include cksums.

[mch2]

Signed-off-by: Marc Handalian handalm@amazon.com

Issue #, if available:
closes #223

Description of changes:
This change adds a task to publish to a local staging repo under build/ that includes cksums. It also updates build.sh to use this new task and copy the contents of the staging repo to the output directory.
The maven publish plugin will not include these cksums when publishing to maven local but will when published to a separate folder.

./scripts/build.sh -v 1.2.0 -s false

~/workspace/alerting (maven)$ find ./artifacts/maven/org/opensearch/notification/
./artifacts/maven/org/opensearch/notification/
./artifacts/maven/org/opensearch/notification//maven-metadata.xml.sha256
./artifacts/maven/org/opensearch/notification//maven-metadata.xml
./artifacts/maven/org/opensearch/notification//maven-metadata.xml.sha512
./artifacts/maven/org/opensearch/notification//1.2.0.0
./artifacts/maven/org/opensearch/notification//1.2.0.0/notification-1.2.0.0.pom.sha256
./artifacts/maven/org/opensearch/notification//1.2.0.0/notification-1.2.0.0.jar.sha512
./artifacts/maven/org/opensearch/notification//1.2.0.0/notification-1.2.0.0.jar.sha1
./artifacts/maven/org/opensearch/notification//1.2.0.0/notification-1.2.0.0-sources.jar.sha256
./artifacts/maven/org/opensearch/notification//1.2.0.0/notification-1.2.0.0-sources.jar.sha1
./artifacts/maven/org/opensearch/notification//1.2.0.0/notification-1.2.0.0-javadoc.jar.md5
./artifacts/maven/org/opensearch/notification//1.2.0.0/notification-1.2.0.0-javadoc.jar.sha512
./artifacts/maven/org/opensearch/notification//1.2.0.0/notification-1.2.0.0-javadoc.jar
./artifacts/maven/org/opensearch/notification//1.2.0.0/notification-1.2.0.0-sources.jar
./artifacts/maven/org/opensearch/notification//1.2.0.0/notification-1.2.0.0.pom.sha1
./artifacts/maven/org/opensearch/notification//1.2.0.0/notification-1.2.0.0-sources.jar.sha512
./artifacts/maven/org/opensearch/notification//1.2.0.0/notification-1.2.0.0.pom.md5
./artifacts/maven/org/opensearch/notification//1.2.0.0/notification-1.2.0.0.pom.sha512
./artifacts/maven/org/opensearch/notification//1.2.0.0/notification-1.2.0.0.jar.sha256
./artifacts/maven/org/opensearch/notification//1.2.0.0/notification-1.2.0.0.pom
./artifacts/maven/org/opensearch/notification//1.2.0.0/notification-1.2.0.0.jar.md5
./artifacts/maven/org/opensearch/notification//1.2.0.0/notification-1.2.0.0-sources.jar.md5
./artifacts/maven/org/opensearch/notification//1.2.0.0/notification-1.2.0.0-javadoc.jar.sha1
./artifacts/maven/org/opensearch/notification//1.2.0.0/notification-1.2.0.0.jar
./artifacts/maven/org/opensearch/notification//1.2.0.0/notification-1.2.0.0-javadoc.jar.sha256
./artifacts/maven/org/opensearch/notification//maven-metadata.xml.md5
./artifacts/maven/org/opensearch/notification//maven-metadata.xml.sha1

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[codecov-commenter]

Codecov Report

Merging #224 (9b3a8ff) into main (8b337e7) will decrease coverage by 0.20%.
The diff coverage is n/a.

@@             Coverage Diff              @@
##               main     #224      +/-   ##
============================================
- Coverage     78.63%   78.43%   -0.21%     
+ Complexity      215      212       -3     
============================================
  Files           173      173              
  Lines          6959     6959              
  Branches        912      912              
============================================
- Hits           5472     5458      -14     
- Misses         1002     1017      +15     
+ Partials        485      484       -1     

Impacted Files	Coverage Δ
...arch/alerting/core/schedule/JobSchedulerMetrics.kt	55.55% <0.00%> (-16.67%)	⬇️
...rch/alerting/core/action/node/ScheduledJobStats.kt	55.55% <0.00%> (-11.12%)	⬇️
.../opensearch/alerting/core/schedule/JobScheduler.kt	69.44% <0.00%> (-6.95%)	⬇️
...in/kotlin/org/opensearch/alerting/MonitorRunner.kt	71.38% <0.00%> (-0.68%)	⬇️
...ain/kotlin/org/opensearch/alerting/AlertService.kt	78.04% <0.00%> (-0.49%)	⬇️
...e/action/node/ScheduledJobsStatsTransportAction.kt	75.51% <0.00%> (ø)
.../kotlin/org/opensearch/alerting/core/JobSweeper.kt	72.25% <0.00%> (+0.52%)	⬆️

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