Deprecate options to enable/disable plugin tests

These were added to merge plugin tests into neutron-tempest-plugin in
Train and haven't been necessary since Stein was transitioned to EOL.

Deprecate these options so that we can remove these right after 2025.1
release.

Change-Id: Ia019cc1c1db65f8206727c4184561c44fc847395
diff --git a/releasenotes/notes/deprecate-run-tests-opts-cdf54c17e72d80ac.yaml b/releasenotes/notes/deprecate-run-tests-opts-cdf54c17e72d80ac.yaml
new file mode 100644
index 0000000..a36b333
--- /dev/null
+++ b/releasenotes/notes/deprecate-run-tests-opts-cdf54c17e72d80ac.yaml
@@ -0,0 +1,9 @@
+---
+deprecations:
+  - |
+    The following options have been deprecated, in favor of the mechanism to
+    enable/disable tests according to the available extensions.
+
+    - ``[bgpvpn] run_bgpvpn_tests``
+    - ``[fwaas] run_fwaas_tests``
+    - ``[sfc] run_sfc_tests``