Install whois in CI so right-click test can succeed

[philrz]

The new right-click-menus.spec.ts e2e test set that was added as part of #2895 has failed 100% of the time in CI due to a problem with the who is test case. A recent example failure from this run:

2) right-click-menus.spec.ts:56:3 › right-click-menus › who is ───────────────────────────────────
    Test timeout of 30000ms exceeded.
    Error: locator.click: Application exited
    Call log:
      - waiting for getByRole('button', { name: 'Done', exact: true }).first()
      -   locator resolved to <button type="button">Done</button>
      - attempting click action
      -   waiting for element to be visible, enabled and stable
      -     element is not stable - waiting...
      - element was detached from the DOM, retrying
       at ../helpers/test-app.ts:162
      160 |
      161 |   async click(role: Role | RegExp, name?: string) {
    > 162 |     return this.locate(role, name).click();
          |                                    ^
      163 |   }
      164 |
      165 |   async rightClick(role: Role | RegExp, name?: string) {
        at TestApp.click (/home/runner/work/zui/zui/packages/zui-player/helpers/test-app.ts:162:[36](https://github.com/brimdata/zui/actions/runs/7492874104/job/20397350722#step:8:37))
        at /home/runner/work/zui/zui/packages/zui-player/tests/right-click-menus.spec.ts:63:15

Despite the scary "Application exited" wording, closer inspection reveals a simple explanation: The right-click Whois lookup in Zui still relies on a whois executable being present (see #1052). This PR just adds the executable to the Actions Runners where needed. The run https://github.com/brimdata/zui/actions/runs/7493437314/job/20399136004 on this branch shows the test now passing on all three OSes.