CLI does not display preview for PF when detailed diff is specified

[VenelinMartinov]

The CLI does not display a preview for PF bridged resources if the PF returns a detailedDiff in the Diff response. This might be an issue with the providerServer middle layer: https://github.com/pulumi/pulumi/blob/3149ab2047ad7bbf128f2e378085fc534b2924a3/sdk/go/common/resource/plugin/provider_server.go#L100

See the tests in #2602

example:

tfbridgetests.testOutput{
	initialValue: &[]string{},
	changeValue:  &[]string{"value"},
	tfOut: `
Terraform used the selected providers to generate the following execution
plan. Resource actions are indicated with the following symbols:
  ~ update in-place

Terraform will perform the following actions:

  # testprovider_test.res will be updated in-place
  ~ resource "testprovider_test" "res" {
        id  = "test-id"
      ~ key = [
          + "value",
        ]
    }

Plan: 0 to add, 1 to change, 0 to destroy.

`,
	pulumiOut: `Previewing update (test):
  pulumi:pulumi:Stack: (same)
    [urn=urn:pulumi:test::project::pulumi:pulumi:Stack::project-test]
    ~ testprovider:index/test:Test: (update)
        [id=test-id]
        [urn=urn:pulumi:test::project::testprovider:index/test:Test::p]
Resources:
    ~ 1 to update
    1 unchanged
`,
	detailedDiff: map[string]interface{}{"keys[0]": map[string]interface{}{}},
}

[pulumi-bot]

This issue has been addressed in PR #2628 and shipped in release v3.97.0.