intellij: fix e2e configurations, remove watcherTasks

End-to-end test configurations within IntelliJ were not updated since
the metropolis package rename from //core into //metropolis.

Additionally, the watcherTasks seem to also have been broken forever, as
they attempted to build proto paths that didn't exist, and trigger
goimports which we haven't used for ages. This just removes them, as
I'm not exactly sure what their intended use was.

Change-Id: I277b642a2b4a6c897150652106eac17cbc8c9732
Reviewed-on: https://review.monogon.dev/c/monogon/+/62
Reviewed-by: Leopold Schabel <leo@nexantic.com>
diff --git a/intellij/run/e2e_test_in_dbg_mode.xml b/intellij/run/e2e_test_in_dbg_mode.xml
index 8077a5d..578e76c 100644
--- a/intellij/run/e2e_test_in_dbg_mode.xml
+++ b/intellij/run/e2e_test_in_dbg_mode.xml
@@ -1 +1 @@
-<configuration default="false" name="e2e test in dbg mode" type="BlazeCommandRunConfigurationType" factoryName="Bazel Command"><blaze-settings handler-id="BlazeGoRunConfigurationHandlerProvider" kind="go_test" blaze-command="test"><blaze-target>//core/tests/e2e:go_default_test</blaze-target><blaze-user-flag>--test_output=streamed</blaze-user-flag><blaze-user-flag>--cache_test_results=no</blaze-user-flag><blaze-user-flag>--compilation_mode=dbg</blaze-user-flag><blaze-user-flag>--test_timeout=3600</blaze-user-flag></blaze-settings><method v="2"><option name="Blaze.BeforeRunTask" enabled="true" /></method></configuration>
\ No newline at end of file
+<configuration default="false" name="e2e test in dbg mode" type="BlazeCommandRunConfigurationType" factoryName="Bazel Command"><blaze-settings handler-id="BlazeGoRunConfigurationHandlerProvider" kind="go_test" blaze-command="test"><blaze-target>//metropolis/test/e2e:go_default_test</blaze-target><blaze-user-flag>--test_output=streamed</blaze-user-flag><blaze-user-flag>--cache_test_results=no</blaze-user-flag><blaze-user-flag>--compilation_mode=dbg</blaze-user-flag><blaze-user-flag>--test_timeout=3600</blaze-user-flag></blaze-settings><method v="2"><option name="Blaze.BeforeRunTask" enabled="true" /></method></configuration>