Bugfix: Resolve awsteam_settings update flow.

[brittandeyoung]

Description

This PR resolves the issue where computed fields where not being properly saved to state after an update is performed.

Relations

Closes #41

References

Output from Running Acceptance Tests

Failing tests before change:

$  make testacc TESTARGS='-run=TestAccSettings'
TF_ACC=1 go test ./... -v -run=TestAccSettings -timeout 120m
?       github.com/brittandeyoung/terraform-provider-awsteam    [no test files]
?       github.com/brittandeyoung/terraform-provider-awsteam/internal/acctest   [no test files]
?       github.com/brittandeyoung/terraform-provider-awsteam/internal/envvar    [no test files]
?       github.com/brittandeyoung/terraform-provider-awsteam/internal/names     [no test files]
?       github.com/brittandeyoung/terraform-provider-awsteam/internal/sdk/awsteam       [no test files]
=== RUN   TestAccSettings_serial
=== PAUSE TestAccSettings_serial
=== CONT  TestAccSettings_serial
=== RUN   TestAccSettings_serial/Resource
=== RUN   TestAccSettings_serial/Resource/basic
=== RUN   TestAccSettings_serial/Resource/duration
    settings_test.go:90: Step 3/3 error: Error running apply: exit status 1
        
        Error: Provider returned invalid result object after apply
        
        After the apply operation, the provider still indicated an unknown value for
        awsteam_settings.test.created_at. All values must be known after apply, so
        this is always a bug in the provider and should be reported in the provider's
        own repository. Terraform will still save the other known object values in
        the state.
        
        Error: Provider returned invalid result object after apply
        
        After the apply operation, the provider still indicated an unknown value for
        awsteam_settings.test.modified_by. All values must be known after apply, so
        this is always a bug in the provider and should be reported in the provider's
        own repository. Terraform will still save the other known object values in
        the state.
        
        Error: Provider returned invalid result object after apply
        
        After the apply operation, the provider still indicated an unknown value for
        awsteam_settings.test.updated_at. All values must be known after apply, so
        this is always a bug in the provider and should be reported in the provider's
        own repository. Terraform will still save the other known object values in
        the state.
=== RUN   TestAccSettings_serial/DataSource
=== RUN   TestAccSettings_serial/DataSource/basic
--- FAIL: TestAccSettings_serial (16.54s)
    --- FAIL: TestAccSettings_serial/Resource (11.03s)
        --- PASS: TestAccSettings_serial/Resource/basic (5.08s)
        --- FAIL: TestAccSettings_serial/Resource/duration (5.94s)
    --- PASS: TestAccSettings_serial/DataSource (5.51s)
        --- PASS: TestAccSettings_serial/DataSource/basic (5.51s)
FAIL
FAIL    github.com/brittandeyoung/terraform-provider-awsteam/internal/provider  16.992s
FAIL
make: *** [testacc] Error 1

...

Passing tests after change:

 ✗ make testacc TESTARGS='-run=TestAccSettings'
TF_ACC=1 go test ./... -v -run=TestAccSettings -timeout 120m
?       github.com/brittandeyoung/terraform-provider-awsteam    [no test files]
?       github.com/brittandeyoung/terraform-provider-awsteam/internal/acctest   [no test files]
?       github.com/brittandeyoung/terraform-provider-awsteam/internal/envvar    [no test files]
?       github.com/brittandeyoung/terraform-provider-awsteam/internal/names     [no test files]
?       github.com/brittandeyoung/terraform-provider-awsteam/internal/sdk/awsteam       [no test files]
=== RUN   TestAccSettings_serial
=== PAUSE TestAccSettings_serial
=== CONT  TestAccSettings_serial
=== RUN   TestAccSettings_serial/Resource
=== RUN   TestAccSettings_serial/Resource/basic
=== RUN   TestAccSettings_serial/Resource/duration
=== RUN   TestAccSettings_serial/DataSource
=== RUN   TestAccSettings_serial/DataSource/basic
--- PASS: TestAccSettings_serial (12.40s)
    --- PASS: TestAccSettings_serial/Resource (9.28s)
        --- PASS: TestAccSettings_serial/Resource/basic (4.76s)
        --- PASS: TestAccSettings_serial/Resource/duration (4.53s)
    --- PASS: TestAccSettings_serial/DataSource (3.12s)
        --- PASS: TestAccSettings_serial/DataSource/basic (3.12s)
PASS
ok      github.com/brittandeyoung/terraform-provider-awsteam/internal/provider  12.907s