[ui] Fix base path when opening a new window (#25909)

## Summary & Motivation

Preserve the base path when opening a new tab for "Open in Launchpad" on
a schedule/sensor dry run.

I created a hook to wrap extraction of the base path and using `_blank`
as the target. I see a few places where we're using `window.open`
without applying the base path, so in a followup I'll go through and
clean those up too.

## How I Tested These Changes

Open a schedule, click "Test schedule", choose a tick. Click "Open in
Launchpad", verify that the new tab opens with a URL that includes the
base path (deployment) prefix.

## Changelog

[ui] Fix "Open in Playground" link when testing a schedule or sensor by
ensuring that it opens to the correct deployment.

js_modules/dagster-ui/packages/ui-core/src/hooks/useOpenInNewTab.tsx

@@ -0,0 +1,12 @@
+import {useContext} from 'react';
+
+import {AppContext} from '../app/AppContext';
+
+// Open a path in a new tab. Incorporates the base path to ensure that
+// the link opens to the appropriate deployment.
+export const useOpenInNewTab = () => {
+  const {basePath} = useContext(AppContext);
+  return (path: string) => {
+    window.open(`${basePath}${path}`, '_blank');
+  };
+};

js_modules/dagster-ui/packages/ui-core/src/ticks/DryRunRequestTable.tsx

@@ -2,6 +2,7 @@ import {Box, Button, Colors, Icon, Table, Tag} from '@dagster-io/ui-components';
 
 import {applyCreateSession, useExecutionSessionStorage} from '../app/ExecutionSessionStorage';
 import {RunRequestFragment} from './types/RunRequestFragment.types';
+import {useOpenInNewTab} from '../hooks/useOpenInNewTab';
 import {PipelineReference} from '../pipelines/PipelineReference';
 import {testId} from '../testing/testId';
 import {useRepository} from '../workspace/WorkspaceContext/util';
@@ -94,6 +95,7 @@ function OpenInLaunchpadButton({
   repoAddress: RepoAddress;
   isJob: boolean;
 }) {
+  const openInNewTab = useOpenInNewTab();
   const pipelineName = request.jobName ?? jobName;
   const [_, onSave] = useExecutionSessionStorage(repoAddress, pipelineName!);
 
@@ -111,12 +113,12 @@ function OpenInLaunchpadButton({
             })),
           }),
         );
-        window.open(
+
+        openInNewTab(
           workspacePathFromAddress(
             repoAddress,
             `/${isJob ? 'jobs' : 'pipelines'}/${pipelineName}/playground`,
           ),
-          '_blank',
         );
       }}
     >