cloudflare_list_item resource

[rwhelan]

Continuation of #2295 without the messy rebase.

Closes #2283

[github-actions]

changelog detected ✅

[jacobbednarz]

acceptance tests all passing

TF_ACC=1 go test ./internal/sdkv2provider -v -run "^(TestAccCloudflareList_|TestAccCloudflareListItem_)" -timeout 120m -parallel 1
=== RUN   TestAccCloudflareListItem_Exists
--- PASS: TestAccCloudflareListItem_Exists (17.99s)
=== RUN   TestAccCloudflareListItem_Update
--- PASS: TestAccCloudflareListItem_Update (29.30s)
=== RUN   TestAccCloudflareListItem_BadListItemType
--- PASS: TestAccCloudflareListItem_BadListItemType (8.50s)
=== RUN   TestAccCloudflareList_Exists
--- PASS: TestAccCloudflareList_Exists (12.28s)
=== RUN   TestAccCloudflareList_UpdateDescription
--- PASS: TestAccCloudflareList_UpdateDescription (22.73s)
=== RUN   TestAccCloudflareList_Update
--- PASS: TestAccCloudflareList_Update (65.02s)
=== RUN   TestAccCloudflareList_UpdateIgnoreIPOrdering
--- PASS: TestAccCloudflareList_UpdateIgnoreIPOrdering (24.84s)
=== RUN   TestAccCloudflareList_RemoveInlineConfig
--- PASS: TestAccCloudflareList_RemoveInlineConfig (36.10s)
PASS
ok  	github.com/cloudflare/terraform-provider-cloudflare/internal/sdkv2provider	217.403s

thanks for this @rwhelan!

[github-actions]

This functionality has been released in v4.2.0 of the Terraform Cloudflare 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!