test(e2e): activate policy variable coverage (#6427)

* test(e2e): activate policy variable coverage

* test(e2e): update policy suite membership

* test(e2e): bind policy selection to Linux listing

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Co-authored-by: houseme <housemecn@gmail.com>

crates/e2e_test/README.md

@@ -72,7 +72,7 @@ The reason string on each attribute is the classifier. Current classes:
 
 - **Needs a pre-started server** — `"requires running RustFS server at
   localhost:9000"` / `"Connects to existing rustfs server"`. These are the
-  `reliant/*` and `policy/test_runner` tests; start a server first (e.g.
+  `reliant/*` tests; start a server first (e.g.
   [`scripts/run_e2e_tests.sh`](../../scripts/run_e2e_tests.sh)) or use
   `--run-ignored`.
 - **Heavy / external tool** — `"Starts a rustfs server; enable when running