chore(tests): Address flakiness on eco-related tests (#94869)

Resolves #93975,
#94793

**Source Code Integrations**

```
tests/sentry/integrations/github/test_webhooks.py::PullRequestEventWebhook::test_multiple_orgs_creates_missing_repo	
```
- The flake seems to have been resolved in
#91347
```
tests/sentry/integrations/github/tasks/test_open_pr_comment.py::TestOpenPRCommentWorkflow::test_comment_workflow
tests/sentry/integrations/gitlab/tasks/test_pr_comment.py::TestCommentWorkflow::test_comment_workflow_updates_comment
tests/sentry/integrations/github/tasks/test_pr_comment.py::TestCommentWorkflow::test_comment_workflow_updates_comment
```
- These I never couldn't repro, but I think it was inconsistent with the
Group.objects.all() call for the created groups, so sometimes the wrong
group was prioritized. Made these consistent to hopefully avoid that in
future runs.


---

**Plugins**

```
tests/sentry_plugins/twilio/test_plugin.py::test_entry_point
tests/sentry_plugins/victorops/test_plugin.py::test_entry_point
```
- The failures dont seem directly related to the entry point tests, but
regardless, they aren't testing anything important, removing them.

```
tests/acceptance/sentry_plugins/test_amazon_sqs.py::AmazonSQSTest::test_simple
```
- These acceptance tests are not useful, I'm deleting the entire
directory

---

**Slack**

```
tests/sentry/integrations/slack/webhooks/actions/test_status.py::StatusActionTest::test_permission_denied
tests/sentry/integrations/slack/webhooks/actions/test_status.py::StatusActionTest::test_permission_denied_through_unfurl
tests/sentry/integrations/slack/webhooks/actions/test_status.py::StatusActionTest::test_archive_issue_until_escalating
```
- The URLs built from these webhooks have signed parameters which use
TimestampSigner. If the timestamp changes between between test and
implementation, a flake is produced. `freeze_time` prevented this.

```
tests/acceptance/test_link_team.py::SlackLinkTeamTest::test_link_team
tests/acceptance/test_link_team.py::SlackLinkTeamTest::test_link_team_as_team_admin
```
- The flakiness was a race, addressed by waiting for the next page to
load

---

**Charts**

```
tests/acceptance/chartcuterie/test_chart_renderer.py::TestChartRenderer::test_debug_renders
tests/acceptance/chartcuterie/test_image_block_builder.py::TestSlackImageBlockBuilder::test_image_block_for_function_regression
tests/acceptance/chartcuterie/test_image_block_builder.py::TestSlackImageBlockBuilder::test_image_not_generated_for_unsupported_issues
```
- Couldn't reproduce any errors here, tried slow network and looping the
test. I just refactored them a bit but leaving them untouched mostly

---

**Integration Utils**

```
tests/sentry/integrations/utils/test_scope.py::BindOrgContextFromIntegrationTest::test_binds_org_context_with_multiple_orgs
tests/sentry/integrations/utils/test_scope.py::BindOrgContextFromIntegrationTest__InRegionMode::test_binds_org_context_with_multiple_orgs
tests/sentry/integrations/utils/test_scope.py::BindOrgContextFromIntegrationTest__InControlMode::test_binds_org_context_with_multiple_orgs
```
- The list of orgs passed to the function could be random in how django
retrieved them. Switched to asserting on the sorted lists for
consistency.

---

**Misc**

```
tests/sentry_plugins/test_anonymizeip.py::test_ipv6
```
- I don't see how this test can flake, its simple and seems pure to me.
ran it 10M times with no errors, if it is flaking there is some unique
pattern to it being run in CI, not within the test itself.
```
tests/sentry/tasks/test_daily_summary.py::DailySummaryTest::test_no_performance_issues
tests/sentry/integrations/opsgenie/test_integration.py::OpsgenieMigrationIntegrationTest::test_migrate_plugin
tests/jobs/
```
 - List sorting flakiness I suspect, but couldn't reproduce the flakes.

Author: leeandher

src/sentry/integrations/slack/views/__init__.py

@@ -11,7 +11,6 @@
 
 
 def build_linking_url(endpoint: str, **kwargs: Any) -> str:
-    """TODO(mgaeta): Remove cast once sentry/utils/http.py is typed."""
     url: str = absolute_uri(reverse(endpoint, kwargs={"signed_params": sign(salt=SALT, **kwargs)}))
     return url
 

src/sentry/templates/sentry/integrations/slack/post-linked-team.html

@@ -11,7 +11,7 @@
       {% trans body_text %}
     </p>
     <p>
-      <a href="slack://channel?id={{ channel_id }}&team={{ team_id }}" class="btn btn-default btn-login-slack">
+      <a href="slack://channel?id={{ channel_id }}&team={{ team_id }}" class="btn btn-default btn-login-slack" data-test-id="back-to-slack">
         <span class="provider-logo slack"></span> Go back to Slack
       </a>
     </p>

src/sentry/testutils/helpers/plugins.py

@@ -12,6 +12,8 @@ def test_debug_renders(self):
         with self.options(options):
             self.browser.get("debug/chart-renderer/")
 
+        self.wait_for_loading()
+
         images = self.browser.elements(selector="img")
         assert len(images) > 0
 

tests/acceptance/sentry_plugins/__init__.py renamed to tests/acceptance/chartcuterie/__init__.py

@@ -12,11 +12,7 @@
     ProfileFunctionRegressionType,
 )
 from sentry.models.group import Group
-from sentry.testutils.cases import (
-    AcceptanceTestCase,
-    MetricsEnhancedPerformanceTestCase,
-    ProfilesSnubaTestCase,
-)
+from sentry.testutils.cases import MetricsEnhancedPerformanceTestCase, ProfilesSnubaTestCase
 from sentry.testutils.helpers.datetime import before_now
 from sentry.testutils.helpers.features import with_feature
 from tests.sentry.issues.test_utils import OccurrenceTestMixin
@@ -25,7 +21,6 @@
 
 
 class TestSlackImageBlockBuilder(
-    AcceptanceTestCase,
     MetricsEnhancedPerformanceTestCase,
     ProfilesSnubaTestCase,
     OccurrenceTestMixin,