soroban-rpc: evict temporary ledger entries

[2opremio]

Core now emits meta to indicate a temporary ledger entry should be evicted. We should use that to delete ledger entries from the database.

From @anupsdf :

Meta emitted on eviction of expired temp entries. Downstream should delete the ledger keys in LedgerCloseMetaV2::evictedTemporaryLedgerKeys

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1. Before addressing this issue, all: add support for new state expiration ledger entries #913 need to be merged.

[tamirms]

This was implemented in #926