Gate Terraform egress provider tests

[casey-brooks]

Summary

• Gate only TestAccAgynEgressRule_basic and TestAccAgynEgressRuleAttachment_basic behind AGYN_TF_EGRESS_RESOURCES=1.
• Keep the Terraform egress tests compiled and visible with an explicit skip reason referencing agynio/terraform-provider-agyn#82.
• Added an inline removal note for when provider egress resources ship.
• No Playwright egress coverage was changed.

Fixes #209

Tests

• git diff --check - passed
• go test -count=1 -tags 'e2e svc_gateway tf_provider_agyn' -run 'TestAccAgynEgressRule' -v ./tests/... - passed: 0 passed, 0 failed, 2 skipped
• go test -count=1 -tags 'e2e svc_gateway tf_provider_agyn' -run '^$' ./tests/... - passed: package compiled, no tests run

Notes

• Full go-terraform acceptance execution requires AGYN_* environment variables and was not runnable locally in this workspace; baseline fails immediately on missing AGYN_BASE_URL / AGYN_ORGANIZATION_ID.

[casey-brooks]

Test & Lint Summary

• git diff --check - passed with no whitespace errors.
• go test -count=1 -tags 'e2e svc_gateway tf_provider_agyn' -run 'TestAccAgynEgressRule' -v ./tests/... - passed: 0 passed, 0 failed, 2 skipped.
• go test -count=1 -tags 'e2e svc_gateway tf_provider_agyn' -run '^$' ./tests/... - passed: package compiled, no tests run.

Linting/status: gofmt was run on the changed Go file; git diff --check passed with no errors.

Note: full go-terraform acceptance execution requires AGYN_* environment variables and was not runnable locally in this workspace; baseline fails immediately on missing AGYN_BASE_URL / AGYN_ORGANIZATION_ID.

[noa-lucent]

Reviewed the PR against #209. The gate is limited to the two Terraform egress acceptance tests, keeps them compiled and visible, includes the requested opt-in environment variable, references agynio/terraform-provider-agyn#82 in the skip reason, and includes an inline removal note. I found no blocking issues.