internal/framework/flex: support set of enum expansion

[jar-b]

Description

This change enables expansion of sets of string enum types with AutoFlex.

% go test ./internal/framework/flex/... -run=TestExpandSetOfStringEnum
--- FAIL: TestExpandSetOfStringEnum (0.00s)
    --- FAIL: TestExpandSetOfStringEnum/empty_value (0.00s)
panic: reflect.Set: value of type []string is not assignable to type []flex.testEnum [recovered]
        panic: reflect.Set: value of type []string is not assignable to type []flex.testEnum

goroutine 6 [running]:
testing.tRunner.func1.2({0x1014e13a0, 0x140006ba040})
        /opt/homebrew/Cellar/go/1.22.2/libexec/src/testing/testing.go:1631 +0x1c4
testing.tRunner.func1()
        /opt/homebrew/Cellar/go/1.22.2/libexec/src/testing/testing.go:1634 +0x33c
panic({0x1014e13a0?, 0x140006ba040?})
        /opt/homebrew/Cellar/go/1.22.2/libexec/src/runtime/panic.go:770 +0x124
reflect.Value.assignTo({0x1014dca40?, 0x140006c20a8?, 0x18?}, {0x100ffa971, 0xb}, 0x1014daf40, 0x0)
        /opt/homebrew/Cellar/go/1.22.2/libexec/src/reflect/value.go:3356 +0x20c
reflect.Value.Set({0x1014daf40?, 0x1400000ee58?, 0x0?}, {0x1014dca40?, 0x140006c20a8?, 0x2?})
        /opt/homebrew/Cellar/go/1.22.2/libexec/src/reflect/value.go:2325 +0xcc
github.com/hashicorp/terraform-provider-aws/internal/framework/flex.autoExpander.setOfString({}, {0x101587de0, 0x101a3f100}, {{0x101a3f100, 0x0, 0x0}, {0x101589b78, 0x101a3f100}, 0x
2}, {0x1014daf40?, ...})
        /Users/jaredbaker/development/terraform-provider-aws/internal/framework/flex/auto_expand.go:550 +0x4fc
github.com/hashicorp/terraform-provider-aws/internal/framework/flex.autoExpander.set({}, {0x101587de0, 0x101a3f100}, {0x10158be50, 0x14000498b40}, {0x1014daf40?, 0x1400000ee58?, 0x8
ef00?})
        /Users/jaredbaker/development/terraform-provider-aws/internal/framework/flex/auto_expand.go:507 +0x344
github.com/hashicorp/terraform-provider-aws/internal/framework/flex.autoExpander.convert({}, {0x101587de0, 0x101a3f100}, {0x101566840?, 0x14000498b40?, 0x140006b6d08?}, {0x1014daf40
?, 0x1400000ee58?, 0x140006b6e10?})
        /Users/jaredbaker/development/terraform-provider-aws/internal/framework/flex/auto_expand.go:93 +0x49c
github.com/hashicorp/terraform-provider-aws/internal/framework/flex.autoFlexConvert({0x101587de0, 0x101a3f100}, {0x101566840, 0x14000498b40}, {0x1014daf80, 0x1400000ee58}, {0x101583
f88, 0x101a3f100})
        /Users/jaredbaker/development/terraform-provider-aws/internal/framework/flex/autoflex.go:54 +0x214
github.com/hashicorp/terraform-provider-aws/internal/framework/flex.Expand({0x101587de0, 0x101a3f100}, {0x101566840, 0x14000498b40}, {0x1014daf80, 0x1400000ee58}, {0x0, 0x0, 0x14000
05df18?})
        /Users/jaredbaker/development/terraform-provider-aws/internal/framework/flex/auto_expand.go:35 +0xb0
github.com/hashicorp/terraform-provider-aws/internal/framework/flex.runAutoExpandTestCases.func1(0x140000a96c0)
        /Users/jaredbaker/development/terraform-provider-aws/internal/framework/flex/auto_expand_test.go:898 +0x8c
testing.tRunner(0x140000a96c0, 0x140004b52d0)
        /opt/homebrew/Cellar/go/1.22.2/libexec/src/testing/testing.go:1689 +0xec
created by testing.(*T).Run in goroutine 4
        /opt/homebrew/Cellar/go/1.22.2/libexec/src/testing/testing.go:1742 +0x318
FAIL    github.com/hashicorp/terraform-provider-aws/internal/framework/flex     0.303s
FAIL

After:

% go test ./internal/framework/flex/... -run=TestExpandSetOfStringEnum
ok      github.com/hashicorp/terraform-provider-aws/internal/framework/flex     0.480s

Relations

Relates #36557 (Added a similar enhancement for lists, but without tests 🙈 )
Relates #36731 (Fix depends on this)

[github-actions]

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[ewbankkit]

LGTM 🚀.

[github-actions]

This functionality has been released in v5.45.0 of the Terraform AWS Provider. Please see the Terraform documentation on provider versioning or reach out if you need any assistance upgrading.

For further feature requests or bug reports with this functionality, please create a new GitHub issue following the template. Thank you!

[github-actions]

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