[jdk25u-dev] RFR: 8361894: sun/security/krb5/config/native/TestDynamicStore.java ensure that the test is run with sudo

[Roland Mesde]

Backporting JDK-8361894: sun/security/krb5/config/native/TestDynamicStore.java ensure that the test is run with sudo.

This PR adds a UI popup that detects and warns users when TestDynamicStore.java is run without required sudo privileges, preventing confusing access-related failures.

For parity with Oracle JDK.

Ran related tests on macos-aarch64:

sudo -E ~/github/jtreg/build/images/jtreg/bin/jtreg -jdk build/macosx-aarch64-server-release/images/jdk -m test/jdk/sun/security/krb5/config/native/TestDynamicStore.java

```Test Result: Error. Parse Exception: '/manual' disables use of '/timeout'```

The test fails due to https://bugs.openjdk.org/browse/JDK-8373793, which will be backported in a dependent PR.

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Commit messages:
 - Backport f73e56e24f0edfaeb99e2106a56725ea033bd6d6

Changes: https://git.openjdk.org/jdk25u-dev/pull/292/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk25u-dev&pr=292&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8361894
  Stats: 15 lines in 1 file changed: 13 ins; 0 del; 2 mod
  Patch: https://git.openjdk.org/jdk25u-dev/pull/292.diff
  Fetch: git fetch https://git.openjdk.org/jdk25u-dev.git pull/292/head:pull/292

PR: https://git.openjdk.org/jdk25u-dev/pull/292