Fix web test setup and test-file selection

Add shared and changeViewIntegration to the mocked Gerrit Styles API to
satisfy the current TypeScript interface.

Remove the unsupported --dir argument, which caused production
JavaScript files to be selected as tests. Keep the explicit *_test.js
pattern.

Change-Id: I2826d60fa7362f9d65e3c005f7939b00fd7f5f27

web/test/test-setup.ts

diff --git a/web/test/test-setup.ts b/web/test/test-setup.ts
index b335daa..ebe6a17 100644
--- a/web/test/test-setup.ts
+++ b/web/test/test-setup.ts
@@ -32,9 +32,11 @@
     form: css``,
     material: css``,
     menuPage: css``,
+    shared: css``,
     spinner: css``,
     subPage: css``,
     table: css``,
     modal: css``,
+    changeViewIntegration: css``,
   },
 };

web/web_test_runner.sh

diff --git a/web/web_test_runner.sh b/web/web_test_runner.sh
index 09cdb9c..26cce76 100755
--- a/web/web_test_runner.sh
+++ b/web/web_test_runner.sh
@@ -2,6 +2,5 @@
 
 set -euo pipefail
 ./$1 --config $2 \
-  --dir 'plugins/checks/web/_bazel_ts_out_tests' \
   --test-files 'plugins/checks/web/_bazel_ts_out_tests/*_test.js' \
   --ts-config="plugins/checks/web/tsconfig.json"