chore: Add acceptance tests for zero_trust_dlp_settings resource

[tsunrise]

• I understand that this repository is auto-generated and my pull request may not be merged

Changes being requested

Add acceptance tests for zero_trust_dlp_settings resource

Acceptance test run results

• I have added or updated acceptance tests for my changes
• I have run acceptance tests for my changes and included the results below

Steps to run acceptance tests

TF_ACC=1 go test -v -run 'TestAccCloudflareZeroTrustDLPSettings_' -count=1 ./internal/services/zero_trust_dlp_settings

Test output

=== RUN   TestAccCloudflareZeroTrustDLPSettings_Basic
--- PASS: TestAccCloudflareZeroTrustDLPSettings_Basic (4.92s)
=== RUN   TestAccCloudflareZeroTrustDLPSettings_PartialConfig
--- PASS: TestAccCloudflareZeroTrustDLPSettings_PartialConfig (3.13s)
PASS
ok  	github.com/cloudflare/terraform-provider-cloudflare/internal/services/zero_trust_dlp_settings	9.818s

Additional context & links