fix: AuthPluginParent wasn't working when embedded in an iframe

[mofojed]

• Check for window.opener or window.parent when using AuthPluginParent
• Reorder plugin priority to use AuthPluginParent first if specified
• Tested using an example html page that both embeds and pops open a new tab
• Fixes AuthPluginParent should work when embed is opened in an iframe #1373

To test:

1. Start up deephaven-core with PSK set to hello: ./gradlew server-jetty-app:run -Ppsk=hello
2. Start up Web UI: npm start
3. Create a table named t in the Web UI at https://localhost:4000:

from deephaven import empty_table
t = empty_table(50).update(["x=i%5", "y=(i*i)%5"])

4. Open the HTML file in the provided zip.
   iframe-auth-provider-local.zip
5. Ensure the table appears correctly in the iframe. Click the "Open in new tab" link, and ensure the table opens there correctly as well.

Also tested that going to localhost:4010/?name=t&authProvider=parent directly did not try and use the parent plugin, because it wasn't opened by another window.

[codecov]

Codecov Report

Merging #1383 (7d41761) into main (004ac6c) will increase coverage by 0.01%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##             main    #1383      +/-   ##
==========================================
+ Coverage   45.58%   45.59%   +0.01%     
==========================================
  Files         506      506              
  Lines       34968    34975       +7     
  Branches     8735     8737       +2     
==========================================
+ Hits        15940    15947       +7     
  Misses      18977    18977              
  Partials       51       51              

Flag	Coverage Δ
unit	45.59% <100.00%> (+0.01%)	⬆️

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
...ackages/app-utils/src/components/AuthBootstrap.tsx	93.33% <ø> (ø)
packages/auth-plugins/src/AuthPluginParent.tsx	93.75% <100.00%> (ø)
packages/jsapi-utils/src/MessageUtils.ts	77.77% <100.00%> (+3.30%)	⬆️