Add tests/integration/object/bucket/policy, converting the bucket policy
slice of the legacy testObjectStoreOperations onto the shared store: an OBC
created with a bucketPolicy additionalConfig, the policy verified verbatim
on the rgw bucket over the S3 API, then updated and removed with the bucket
polled until it reflects each change. The policy JSON is generated from the
bucket name, which the legacy test hardcoded in the Resource ARN. It runs
against the shared store in both the TLS and non-TLS passes.
Drop the converted policy block from the legacy test.
Signed-off-by: Joshua Hoblitt <josh@hoblitt.com>