CMR-11537: Update Reshard request to include "conflict":"proceed"

[jmaeng72]

Overview

What is the objective?

To prevent reshard process from failing due to version conflicts, we needed to update our /_reindex elastic request to continue copying over docs to new index even when it faces a version conflict

What are the changes?

Update /_reindex request to es in CMR

What areas of the application does this impact?

Indexer, Bootstrap

Required Checklist

• New and existing unit and int tests pass locally and remotely
• clj-kondo has been run locally and all errors in changed files are corrected
• I have commented my code, particularly in hard-to-understand areas
• I have made changes to the documentation (if necessary)
• My changes generate no new warnings

Additional Checklist

• I have removed unnecessary/dead code and imports in files I have changed
• I have cleaned up integration tests by doing one or more of the following:
  • migrated any are2 tests to are3 in files I have changed
  • de-duped, consolidated, removed dead int tests
  • transformed applicable int tests into unit tests
  • reduced number of system state resets by updating fixtures. Ex) (use-fixtures :each (ingest/reset-fixture {})) to be :once instead of :each