Java high-level REST client completeness for ILM APIs

[colings86]

Note: these APIs are on the index-lifecycle branch at the moment so will need to be implemented on that branch until its ready to merge to master, see #29823

• Put lifecycle (@gwbrown) HLRC: Add Put Lifecycle Policy API to HLRC #33250
• Get lifecycle (@gwbrown) HLRC: Add Get Lifecycle Policy API to HLRC #33323
• Delete lifecycle (@gwbrown) HLRC: Add Lifecycle delete to the HLRC #33142
• Explain lifecycle (@colings86) Adds explain lifecycle API to the Rest Client #32606
  • Port to new HLRC structure (@gwbrown) [ILM] Convert Explain request to new HLRC classes #34922
• Get status (@jakelandis) HLRC: Add ILM Status to HLRC #33283
• Start ILM (@colings86) Adds REST client support for starting and stopping ILM #32609
  • Port to new HLRC structure [HLRC] Update Stop & Start ILM APIs to use Validatable #34242
• Stop ILM (@colings86) Adds REST client support for starting and stopping ILM #32609
  • Port to new HLRC structure [HLRC] Update Stop & Start ILM APIs to use Validatable #34242
• Move to step (Not implementing as this is an expert API that should not be called programatically)
• Retry step (@original-brownbear) HLRC: Add ILM Retry #33990
• Remove policy from index (@jdconrad) HLRC: Add remove index lifecycle policy #34204
• Set policy for index (@dakrone) Add high level rest client support for SetIndexLifecyclePolicy #32443 (being removed)
  • Port to new HLRC structure [HLRC] Update Set Policy API to use Validatable #34248

[elasticmachine]

Pinging @elastic/es-core-infra