ci: increase the resource_class of build-bazel-e2e

This commit changes the build-bazel-e2e `resource_class` from small to medium as currently this step is failing due to the lack of resources.

The increase in resources is needed due to the increase in targets
```
yarn bazel query "//tests/legacy-cli/..."
ts_library rule //tests/legacy-cli:runner
_js_library rule //tests/legacy-cli/e2e/assets:assets
ts_library rule //tests/legacy-cli/e2e/initialize:initialize
ts_library rule //tests/legacy-cli/e2e/ng-snapshot:ng-snapshot
ts_library rule //tests/legacy-cli/e2e/setup:setup
ts_library rule //tests/legacy-cli/e2e/tests:tests
ts_library rule //tests/legacy-cli/e2e/utils:utils
```

(cherry picked from commit 5d608b7)

Author: alan-agius4

.circleci/dynamic_config.yml

@@ -271,6 +271,7 @@ jobs:
 
   build-bazel-e2e:
     executor: action-executor
+    resource_class: medium
     steps:
       - custom_attach_workspace
       - run: yarn bazel build //tests/legacy-cli/...