add support for custom_s2s posture integration, rule, and documentation

[jlu-cloudflare]

depends on cloudflare/cloudflare-go#3031

[github-actions]

changelog detected ✅

[jacobbednarz]

acceptance tests all passing

TF_ACC=1 go test ./internal/sdkv2provider -v -run "^TestAccCloudflareDevicePosture" -count 1 -timeout 120m -parallel 1
=== RUN   TestAccCloudflareDevicePostureRules_DataSource
--- PASS: TestAccCloudflareDevicePostureRules_DataSource (8.96s)
=== RUN   TestAccCloudflareDevicePostureIntegrationCreate
--- PASS: TestAccCloudflareDevicePostureIntegrationCreate (1.11s)
=== RUN   TestAccCloudflareDevicePostureRule_SerialNumber
--- PASS: TestAccCloudflareDevicePostureRule_SerialNumber (3.77s)
=== RUN   TestAccCloudflareDevicePostureRule_OsVersion
--- PASS: TestAccCloudflareDevicePostureRule_OsVersion (4.22s)
=== RUN   TestAccCloudflareDevicePostureRule_OsVersionExtra
--- PASS: TestAccCloudflareDevicePostureRule_OsVersionExtra (3.79s)
=== RUN   TestAccCloudflareDevicePostureRule_LinuxOsDistro
--- PASS: TestAccCloudflareDevicePostureRule_LinuxOsDistro (4.14s)
=== RUN   TestAccCloudflareDevicePostureRule_DomainJoined
--- PASS: TestAccCloudflareDevicePostureRule_DomainJoined (3.72s)
=== RUN   TestAccCloudflareDevicePostureRule_Firewall
--- PASS: TestAccCloudflareDevicePostureRule_Firewall (3.73s)
=== RUN   TestAccCloudflareDevicePostureRule_DiskEncryption_RequireAll
--- PASS: TestAccCloudflareDevicePostureRule_DiskEncryption_RequireAll (4.87s)
=== RUN   TestAccCloudflareDevicePostureRule_DiskEncryption_CheckDisks
--- PASS: TestAccCloudflareDevicePostureRule_DiskEncryption_CheckDisks (4.05s)
=== RUN   TestAccCloudflareDevicePostureRule_Intune
    provider_test.go:217: Skipping acceptance test for default account (f037e56e89293a057740de681ac9abbe). Assertion requires active Intune license.
--- SKIP: TestAccCloudflareDevicePostureRule_Intune (0.00s)
PASS
PASS	github.com/cloudflare/terraform-provider-cloudflare/internal/sdkv2provider	42.397s
PASS

[github-actions]

This functionality has been released in v4.43.0 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!