[ZEPPELIN-6520] Bind repository proxy password input to proxyPassword control

[kimyenac]

What is this PR for?

In the interpreter "add repository" dialog, the proxy Password input was bound to the wrong reactive-form control (proxyLogin) — the same control the Login field already uses. As a result a proxy password could never be saved, and typing a proxy password overwrote the proxy login.

This PR binds the Password input to the proxyPassword control so that both proxy credentials are submitted independently.

create-repository-modal.component.html:

-      <input nz-input type="password" formControlName="proxyLogin" placeholder="proxy password" />
+      <input nz-input type="password" formControlName="proxyPassword" placeholder="proxy password" />

What type of PR is it?

Bug Fix

Todos

• - Fix the form-control binding
• - Add an e2e regression test

What is the ticket?

https://issues.apache.org/jira/browse/ZEPPELIN-6520

How should this be tested?

• cd zeppelin-web-angular && npm run lint
• A Playwright e2e test is added: e2e/tests/workspace/interpreter/create-repository-proxy-credentials.spec.ts. It fills the proxy login and proxy password in the add-repository modal and asserts the POST /api/interpreter/repository payload carries each value in its own field (proxyLogin / proxyPassword). The test fails on the current binding and passes with this fix.
• Manually: add a repository with a proxy login and password in the interpreter UI and confirm both are sent.

Screenshots (if appropriate)

N/A — the form renders identically; the defect is only visible in the submitted payload.

Questions:

• Does the license files need to update? No
• Is there breaking changes for older versions? No
• Does this needs documentation? No