feat(pages_project): State upgrade

[vaishakdinesh]

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

Changes being requested

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_MIG_TEST=true TF_ACC=1 go test -p 1  ./internal/services/pages_project/migration/v500  -run "TestMi" -v

Test output

=== RUN   TestMigratePagesProject_V4ToV5_Minimal
--- PASS: TestMigratePagesProject_V4ToV5_Minimal (15.20s)
=== RUN   TestMigratePagesProject_V4ToV5_WithBuildConfig
--- PASS: TestMigratePagesProject_V4ToV5_WithBuildConfig (21.34s)
=== RUN   TestMigratePagesProject_V4ToV5_WithSourceAndConfig
    migrations_test.go:132: Skipping test that requires valid GitHub repository - API validates repository existence
--- SKIP: TestMigratePagesProject_V4ToV5_WithSourceAndConfig (0.00s)
=== RUN   TestMigratePagesProject_V4ToV5_WithDeploymentConfigsBasic
--- PASS: TestMigratePagesProject_V4ToV5_WithDeploymentConfigsBasic (15.47s)
=== RUN   TestMigratePagesProject_V4ToV5_WithEnvironmentVariables
    migrations_test.go:256: Skipping test - v4 provider doesn't store environment_variables/secrets in deployment_configs attribute properly
--- SKIP: TestMigratePagesProject_V4ToV5_WithEnvironmentVariables (0.00s)
=== RUN   TestMigratePagesProject_V4ToV5_WithBindings
    migrations_test.go:345: Skipping binding test - requires TEST_CLOUDFLARE_KV_NAMESPACE_ID, TEST_CLOUDFLARE_D1_DATABASE_ID, and TEST_CLOUDFLARE_WORKER_NAME
--- SKIP: TestMigratePagesProject_V4ToV5_WithBindings (0.00s)
=== RUN   TestMigratePagesProject_V4ToV5_FullResource
--- PASS: TestMigratePagesProject_V4ToV5_FullResource (15.65s)
=== RUN   TestMigratePagesProject_V4ToV5_WithBuildConfigComplete
--- PASS: TestMigratePagesProject_V4ToV5_WithBuildConfigComplete (20.69s)
=== RUN   TestMigratePagesProject_V4ToV5_WithDurableObjectNamespaces
    migrations_test.go:536: Skipping - requires TEST_CLOUDFLARE_DO_NAMESPACE_ID
--- SKIP: TestMigratePagesProject_V4ToV5_WithDurableObjectNamespaces (0.00s)
=== RUN   TestMigratePagesProject_V4ToV5_WithCompatibilityFlags
--- PASS: TestMigratePagesProject_V4ToV5_WithCompatibilityFlags (16.26s)
=== RUN   TestMigratePagesProject_V4ToV5_WithDefaultChanges
--- PASS: TestMigratePagesProject_V4ToV5_WithDefaultChanges (17.06s)
=== RUN   TestMigratePagesProject_V4ToV5_WithUsageModelExplicit
--- PASS: TestMigratePagesProject_V4ToV5_WithUsageModelExplicit (15.63s)
=== RUN   TestMigratePagesProject_V4ToV5_WithMultipleBindings
    migrations_test.go:748: Skipping - requires TEST_CLOUDFLARE_KV_NAMESPACE_ID, TEST_CLOUDFLARE_D1_DATABASE_ID, and TEST_CLOUDFLARE_DO_NAMESPACE_ID
--- SKIP: TestMigratePagesProject_V4ToV5_WithMultipleBindings (0.00s)
=== RUN   TestMigratePagesProject_V4ToV5_WithMultipleServiceBindings
--- PASS: TestMigratePagesProject_V4ToV5_WithMultipleServiceBindings (15.59s)
=== RUN   TestMigratePagesProject_V4ToV5_WithAlwaysUseLatestCompatibilityDate
--- PASS: TestMigratePagesProject_V4ToV5_WithAlwaysUseLatestCompatibilityDate (16.71s)
PASS
ok  	github.com/cloudflare/terraform-provider-cloudflare/internal/services/pages_project/migration/v500	171.397s

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