Tombstone retention#829

kbatuigas merged 15 commits intov-WIP/24.3redpanda-data/docs:v-WIP/24.3from

DOC-386-Document-feature-Tombstone-retention-policies-Support-delete_retention_ms-in-the-way-it-works-in-Kafkaredpanda-data/docs:DOC-386-Document-feature-Tombstone-retention-policies-Support-delete_retention_ms-in-the-way-it-works-in-KafkaCopy head branch name to clipboard