Add IPFS usage metrics / extend logging / extend supported content path formats

[isum]

This PR introduces the following improvements to IPFS:

• Adds 4 new metrics grouped by deployment hashes:
  • ipfs_request_count - shows the total number of IPFS requests
  • ipfs_error_count - shows the total number of failed IPFS requests
  • ipfs_not_found_count - shows the total number of IPFS requests that timed out
  • ipfs_request_duration - shows the duration of successful IPFS requests
• Fixes a minor bug that could cause the IPFS gateway client to fail during initialization
• The IPFS content path parser now supports the following formats:
  • <CID>[/<path>]
  • /ipfs/<CID>[/<path>]
  • ipfs://<CID>[/<path>]
  • http[s]://.../ipfs/<CID>[/<path>]
  • http[s]://.../api/v0/cat?arg=<CID>[/<path>]
  • http[s]://.../<CID>[/<path>]
• IPFS error logs now include more context, such as deployment hash and the requested IPFS path

Closes #6036