Utilize gocloud and blob store to work around pubsub message size

[pxp928]

Description of the PR

Address the sizing issue for NATS in issue #731

The key is the hash of the SBOM such that it can be retrieved later if needed based on hasSBOM data.

Tested via S3 and works by reading and writing to the bucket.
Note: currently it does not delete items from the bucket.

For local testing:

Filesystem can be used as documented here: https://gocloud.dev/howto/blob/#local

PR Checklist

• All commits have a Developer Certificate of Origin (DCO) -- they are generated using -s flag to git commit.
• All new changes are covered by tests
• If GraphQL schema is changed, make generate has been run
• If collectsub protobuf has been changed, make proto has been run
• All CI checks are passing (tests and formatting)
• All dependent PRs have already been merged

[jeffmendoza]

Awesome, some nits