Add google_storage_bucket_object.media_link

[danawillow]

Upstreams hashicorp/terraform-provider-google#6897

Release Note Template for Downstream PRs (will be copied)

storage: added output-only `media_link` to `google_storage_bucket_object`

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[modular-magician]

Hi! I'm the modular magician. Your PR generated some diffs in downstreams - here they are.

Diff report:

Terraform GA: Diff ( 4 files changed, 12 insertions(+))
Terraform Beta: Diff ( 4 files changed, 12 insertions(+))

[modular-magician]

I have triggered VCR tests based on this PR's diffs. See the results here: "https://ci-oss.hashicorp.engineering/viewQueued.html?itemId=136987"

[iangudger]

@googlebot I consent.