Re-implement ability to import resource state

[patrickcping]

Change Description

• Re-implement import routines and add acceptance tests
• Add documentation examples on each resource (merged into this PR from Added terraform import documentation to all applicable resources. #195 )

Testing Results

Testing Shell Command

TF_ACC=1 go test -v -timeout 2400s -run ^ github.com/pingidentity/terraform-provider-davinci/internal/service/davinci

Testing Results

=== RUN   TestAccDatasourceApplication_SlimByAppId
--- PASS: TestAccDatasourceApplication_SlimByAppId (57.23s)
=== RUN   TestAccDatasourceApplication_SlimById
--- PASS: TestAccDatasourceApplication_SlimById (54.95s)
=== RUN   TestAccDataSourceApplications_AllApplications
--- PASS: TestAccDataSourceApplications_AllApplications (60.11s)
=== RUN   TestAccDataSourceConnection_ReadAllAT
--- PASS: TestAccDataSourceConnection_ReadAllAT (17.56s)
=== RUN   TestAccDataSourceConnection_ReadSingle
--- PASS: TestAccDataSourceConnection_ReadSingle (55.01s)
=== RUN   TestAccDataSourceConnection_ReadSingleByName
--- PASS: TestAccDataSourceConnection_ReadSingleByName (56.01s)
=== RUN   TestAccDataSourceConnection_AllConections
--- PASS: TestAccDataSourceConnection_AllConections (50.16s)
=== RUN   TestAccDataSourceConnection_FilteredConnections
--- PASS: TestAccDataSourceConnection_FilteredConnections (48.71s)
=== RUN   TestAccResourceApplication_Slim
--- PASS: TestAccResourceApplication_Slim (55.66s)
=== RUN   TestAccResourceApplication_WithFlowPolicy
--- PASS: TestAccResourceApplication_WithFlowPolicy (82.63s)
=== RUN   TestAccResourceApplication_P1SessionFlowPolicy
--- PASS: TestAccResourceApplication_P1SessionFlowPolicy (94.12s)
=== RUN   TestAccResourceApplication_BadParameters
--- PASS: TestAccResourceApplication_BadParameters (71.95s)
=== RUN   TestAccResourceConnection_Slim
--- PASS: TestAccResourceConnection_Slim (58.25s)
=== RUN   TestAccResourceConnection_SlimWithUpdate
--- PASS: TestAccResourceConnection_SlimWithUpdate (66.33s)
=== RUN   TestAccResourceConnection_HeavyRead
--- PASS: TestAccResourceConnection_HeavyRead (349.65s)
=== RUN   TestAccResourceConnection_BadParameters
--- PASS: TestAccResourceConnection_BadParameters (73.02s)
=== RUN   TestAccResourceFlow_SimpleFlow
--- PASS: TestAccResourceFlow_SimpleFlow (54.98s)
=== RUN   TestAccResourceFlow_SimpleFlowUpdate
--- PASS: TestAccResourceFlow_SimpleFlowUpdate (79.94s)
=== RUN   TestAccResourceFlow_SubFlows
--- PASS: TestAccResourceFlow_SubFlows (99.75s)
=== RUN   TestAccResourceFlow_VariableConnectorFlow
    resource_flow_test.go:221: Step 2/2 error running import: ImportStateVerify attributes not equivalent. Difference is shown below. The - symbol indicates attributes missing after import.
        
          map[string]string{
                "flow_json": strings.Join({
                        ... // 191 identical bytes
                        `16:09:25 GMT+0000 (Coordinated Universal Time)","createdDate":16`,
                        `92893365739,"updatedDate":1692893366401,"deployedDate":169289336`,
        -               "6401",
        +               "5804",
                        `,"trigger":{},"timeouts":"null","flowId":"ea92a4b81fb1362dab6ef2`,
                        `9a857086a4","companyId":"03898103-53d4-417a-b626-968cd00ffb87","`,
                        ... // 3145 identical bytes
                }, ""),
          }
--- FAIL: TestAccResourceFlow_VariableConnectorFlow (64.72s)
=== RUN   TestAccResourceFlow_BrokenFlow
--- PASS: TestAccResourceFlow_BrokenFlow (45.08s)
=== RUN   TestAccResourceFlow_SchemaChanges
--- PASS: TestAccResourceFlow_SchemaChanges (144.67s)
=== RUN   TestAccResourceFlow_FlowContextVarFlow
--- PASS: TestAccResourceFlow_FlowContextVarFlow (54.04s)
=== RUN   TestAccResourceFlow_BadParameters
--- PASS: TestAccResourceFlow_BadParameters (73.59s)
=== RUN   TestAccResourceVariable_CompanyContext
--- PASS: TestAccResourceVariable_CompanyContext (59.06s)
=== RUN   TestAccResourceVariable_FlowInstanceContext
--- PASS: TestAccResourceVariable_FlowInstanceContext (59.19s)
=== RUN   TestAccResourceVariable_BadParameters
--- PASS: TestAccResourceVariable_BadParameters (72.45s)
FAIL
FAIL    github.com/pingidentity/terraform-provider-davinci/internal/service/davinci     2059.391s
FAIL

[patrickcping]

@samir-gandhi need to review the test failure to see what we can do about it, but in the meantime feel free to code review