Add dependandabot yml file

[cwperks]

Description

Add dependandabot yaml file. Dependandabot should check dependencies weekly and create commits with "dependabot:" prefix

Issues Resolved

Modeled after: opensearch-project/security#2958

Check List

• New functionality includes testing
• New functionality has been documented
• Commits are signed per the DCO using --signoff

By submitting this pull request, I confirm that my contribution is made under the terms of the Apache 2.0 license.
For more information on following Developer Certificate of Origin and signing off your commits, please check here.

[codecov]

Codecov Report

Merging #444 (1e96897) into main (d2e0ac0) will not change coverage.
The diff coverage is n/a.

@@            Coverage Diff            @@
##               main     #444   +/-   ##
=========================================
  Coverage     29.19%   29.19%           
  Complexity       98       98           
=========================================
  Files            22       22           
  Lines          1185     1185           
  Branches        109      109           
=========================================
  Hits            346      346           
  Misses          818      818           
  Partials         21       21           

[joshpalis]

fatal error in thread [main], exiting
�  java.lang.NoClassDefFoundError: org/opensearch/common/lifecycle/LifecycleListener
�  	at java.base/java.lang.Class.getDeclaredConstructors0(Native Method)
�  	at java.base/java.lang.Class.privateGetDeclaredConstructors(Class.java:3373)
�  	at java.base/java.lang.Class.getConstructors(Class.java:2060)
�  	at org.opensearch.plugins.PluginsService.loadPlugin(PluginsService.java:765)

[cwperks]

Checking to see if bwc tests use SNAPSHOT artifacts

[cwperks]

@joshpalis I added -SNAPSHOT to the end of the version before passing it into testClusters. I believe the issue was that it was not using the latest from 2.x in core which includes the LifecycleComponent refactor.

See details about testClusters resolution here: opensearch-project/OpenSearch#8731 (comment)