Setting default tags via env vars shows a broken preview

[VenelinMartinov]

Describe what happened

The both the TF AWS provider and the pulumi AWS provider allow setting default tags via environment variables:

TF_AWS_DEFAULT_TAGS_abc:bus:owner=Cloud Platforms

In terraform this shows a correct preview, however in Pulumi it fails to show the values for the tags and shows instead:

                    [provider=urn:pulumi:abc-coreinfrastructure-non-prod::abc-cp-vpc::pulumi:providers:aws::default_7_11_0::ID]
                  ~ tagsAll: {
                      + abc:bus:owner         : <null>
...

Sample program

example = aws.s3.Bucket("example",
    bucket="my-tf-test-bucket",
    tags={
        "Name": "My bucket",
        "Environment": "Dev",
    })

Log output

No response

Affected Resource(s)

No response

Output of pulumi about

Additional context

No response

Contributing

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[VenelinMartinov]

Root cause is Consider moving planning to be performed in Check pulumi-terraform-bridge#2281

Check does not run the TF Plan, so when Diff shows a diff in the tags, the engine has no values to display for them, since it diffs against the checked inputs returned by Check instead of the planned outputs returned by Plan