Align tsconfig with ts_project outputs

rules_ts validates that path-affecting TypeScript options are known to
Bazel. The code-owners tsconfig inherited rootDir from the shared
plugin config, which resolves outside the web package, and also
declared an IDE outDir that the ts_project rule overrides anyway.

Override rootDir locally and remove the stale outDir so the effective
tsconfig matches the package-local ts_project outputs, following the
same fix in the delete-project plugin (Ic9d6f031).

Change-Id: I8f2ab4c17d9e6510b3a2c4f97e17d17015b1a2c3

web/tsconfig.json

diff --git a/web/tsconfig.json b/web/tsconfig.json
index ab4cca2..a6cb7e9 100644
--- a/web/tsconfig.json
+++ b/web/tsconfig.json
@@ -2,8 +2,7 @@
   "extends": "../../tsconfig-plugins-base.json",
   "compilerOptions": {
     "experimentalDecorators": true,
-    /* outDir for IDE (overridden by Bazel rule arg) */
-    "outDir": "../../../.ts-out/plugins/code-owners/ui"
+    "rootDir": "."
   },
   "include": [
     "**/*"