don't run filtered tmp processor when reingestion is enabled

[sreuland]

when a reingestion range is being run, the processor runner was still running TransactionFilteredTmpProcessor which is inserting and deleting tx's to history_transactions_filtered_tmp on every flush. This step is un-necessary during reingestion since TransactionFilteredTmpProcessor` only needs to be maintained with transactions from 'forward' ingestion to support tx sub queue processing.

In addtion, during some reingestion runs with parallel workers, observed some long running/hanging DELETE stmts left on the db server which were slowing down overall reingestion workers.

postgres=# SELECT
  pid,
  now() - pg_stat_activity.query_start AS duration,
  query,
  state
FROM pg_stat_activity
WHERE (now() - pg_stat_activity.query_start) > interval '5 minutes';
  pid   |    duration     |                                                query                                                 | state
--------+-----------------+------------------------------------------------------------------------------------------------------+--------
 954110 | 17:10:23.48803  | DELETE FROM history_transactions_filtered_tmp WHERE now() >= (created_at + interval '1 second' * $1) | active
 954342 | 17:08:26.893771 | DELETE FROM history_transactions_filtered_tmp WHERE now() >= (created_at + interval '1 second' * $1) | active
 954457 | 17:09:19.293392 | DELETE FROM history_transactions_filtered_tmp WHERE now() >= (created_at + interval '1 second' * $1) | active
 954539 | 17:07:52.870689 | DELETE FROM history_transactions_filtered_tmp WHERE now() >= (created_at + interval '1 second' * $1) | active
 954540 | 17:08:40.926155 | DELETE FROM history_transactions_filtered_tmp WHERE now() >= (created_at + interval '1 second' * $1) | active
 954543 | 17:08:24.030046 | DELETE FROM history_transactions_filtered_tmp WHERE now() >= (created_at + interval '1 second' * $1) | active
 954564 | 17:07:58.474278 | DELETE FROM history_transactions_filtered_tmp WHERE now() >= (created_at + interval '1 second' * $1) | active
 954565 | 17:07:59.878985 | DELETE FROM history_transactions_filtered_tmp WHERE now() >= (created_at + interval '1 second' * $1) | active

this behavior may be related to the deadlocks situation that was noted and resolved by stellar#5263.

This pr proposes additional changes related to reingestion sql performance on top of the deadlock fix in stellar#5263:

• Removed EnableIngestionFiltering flag and global config variable, it is obsolete, as ingestion filter was permanently enabled, the flag provides no value.
• repoint conditional checks on running TransactionFilteredTmpProcessor to reference ReingestionEnabled instead of EnableIngestionFiltering, this allows the parallel reingestion workers to skip doing that, thus avoiding that additional sql activity

[sreuland]

closing as will retarget this to master