[codex] Remove hardcoded app ID filters (#28947)

## Summary

- remove the duplicated originator-specific connector ID denylists
- stop filtering connector directory/accessibility results and
live/cached Codex Apps MCP tools by hardcoded connector ID
- remove the now-unused `codex-login` dependency from
`codex-utils-plugins`
- update regression coverage so formerly blocked connector IDs are
preserved

## Why

The client-side policy was duplicated across crates, used opaque IDs
without ownership or expiry information, and could drift between app
listing and MCP tool behavior. Server-provided visibility,
authorization, plugin discoverability, accessibility, enabled-state
handling, and consequential-tool approval templates remain unchanged.

## Validation

- `just fmt`
- `just bazel-lock-update`
- `just bazel-lock-check`
- `git diff --check`
- confirmed the final diff contains no hardcoded denylist symbols

A targeted `codex-mcp` test build spent an unusually long time in local
compilation/linking. Its first attempt exposed a test-only `PartialEq`
assertion issue, which was corrected. A follow-up non-linking `cargo
check -p codex-mcp --tests` was still running when this draft was
opened; CI should provide the complete Rust validation.

codex-rs/utils/plugins/src/mcp_connector.rs

@@ -1,31 +1,3 @@
-use codex_login::default_client::is_first_party_chat_originator;
-use codex_login::default_client::originator;
-
-const DISALLOWED_CONNECTOR_IDS: &[&str] = &[
-    "asdk_app_6938a94a61d881918ef32cb999ff937c",
-    "connector_2b0a9009c9c64bf9933a3dae3f2b1254",
-    "connector_3f8d1a79f27c4c7ba1a897ab13bf37dc",
-    "connector_68de829bf7648191acd70a907364c67c",
-    "connector_68e004f14af881919eb50893d3d9f523",
-    "connector_69272cb413a081919685ec3c88d1744e",
-];
-const FIRST_PARTY_CHAT_DISALLOWED_CONNECTOR_IDS: &[&str] =
-    &["connector_0f9c9d4592e54d0a9a12b3f44a1e2010"];
-
-pub fn is_connector_id_allowed(connector_id: &str) -> bool {
-    is_connector_id_allowed_for_originator(connector_id, originator().value.as_str())
-}
-
-fn is_connector_id_allowed_for_originator(connector_id: &str, originator_value: &str) -> bool {
-    let disallowed_connector_ids = if is_first_party_chat_originator(originator_value) {
-        FIRST_PARTY_CHAT_DISALLOWED_CONNECTOR_IDS
-    } else {
-        DISALLOWED_CONNECTOR_IDS
-    };
-
-    !disallowed_connector_ids.contains(&connector_id)
-}
-
 pub fn sanitize_name(name: &str) -> String {
     sanitize_slug(name).replace("-", "_")
 }