chore: change the liveRootPath and archiveRootPath to absolute paths as default

[ata-nas]

Description

• DEPENDS ON feat: new BlockWriter implementation for block-as-file #281
• the default values for liveRootPath and archiveRootPath configs of com.hedera.block.server.persistence.storage.PersistenceStorageConfig must be set to absolute paths
  • liveRootPath -> /opt/hashgraph/blocknode/data/live/
  • archiveRootPath -> /opt/hashgraph/blocknode/data/archive/
• see this comment thread

What Needs to be Done

• create a basePath configuration with default value /opt/hashgraph/blocknode/data/
• liveRootPath must be resolved from the basePath with default value live/
• archiveRootPath must be resolved from the basePath with default value archive/
• migrate from String type configs to Path type configs
• simplify/remove preconditions and path resolution logic in constructor

[jsync-swirlds]

Perhaps, rather than setting absolute paths for each entry, create a configuration for "blockNode.filesystem.basePath" set to /opt/hashgraph/blocknode/data and then the two storage paths can be relative to that.