Refactor sdkv2 detailed diff tests (#2816)

This PR refactors the SDKv2 detailed diff tests to make test sharding
easier. The main problem was that TestDetailedDiffSet was too large.
Very similar to what
#2814 does for PF.

This PR:
- Moves the SDKv2 detailed diff tests to their own folder. This should
make sharing code between them easier without exposing it to the other
tests.
- Splits up `TestDetailedDiffSet` into a few separate tests. This will
allow the tests to be run on different shards.
- Moves around some of the shared code into the `value_makers.go` file,
instead of duplicating in each test.
- Renames the tests to specify that they are for SDKv2 and renamed some
of the utility functions to clarify what they do.


[2c18440](2c18440)
has test recordings, the rest are the changes. The test recording
changes are all no-ops related to the change in the struct being
recorded.

pkg/tests/detailed_diff_list_test.go → pkg/tests/diff_test/detailed_diff_list_test.go

@@ -11,7 +11,7 @@ import (
 	crosstests "github.com/pulumi/pulumi-terraform-bridge/v3/pkg/internal/tests/cross-tests"
 )
 
-func TestDetailedDiffList(t *testing.T) {
+func TestSDKv2DetailedDiffList(t *testing.T) {
 	t.Parallel()
 
 	listAttrSchema := schema.Resource{
@@ -297,14 +297,6 @@ func TestDetailedDiffList(t *testing.T) {
 
 	scenarios := append(oneElementScenarios, multiElementScenarios...)
 
-	type testOutput struct {
-		initialValue *[]string
-		changeValue  *[]string
-		tfOut        string
-		pulumiOut    string
-		detailedDiff map[string]any
-	}
-
 	runTest := func(t *testing.T, schema schema.Resource, valueMaker func(*[]string) map[string]cty.Value, initialValue *[]string, changeValue *[]string) {
 		diff := crosstests.Diff(t, &schema, valueMaker(initialValue), valueMaker(changeValue))
 		autogold.ExpectFile(t, testOutput{