indexers: deploy extrinsic metadata indexer to production

Ref. swh/infra/sysadm-environment#5200 (closed)

(to be merged once the config refactoring of !296 (merged) has been validated in staging)

assigned to @olasd

approved this merge request

added 17 commits

• 4aa9b5b2...60ac7952 - 16 commits from branch mr/indexer-config-improvements
• 25f9db21 - indexers: deploy extrinsic metadata indexer to production

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added 53 commits

• 25f9db21...062ff730 - 53 commits from branch mr/indexer-config-improvements

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changed target branch from mr/indexer-config-improvements to production

added 2 commits

• a0515ba1 - Add a ro objstorage which goes AWS - Azure - Local
• 2c5cbba8 - indexers: deploy extrinsic metadata indexer to production

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merged