Add PluginRepositoryAuthProvider for Custom Repository Authentication

[kateliu20]

Solution from: https://youtrack.jetbrains.com/issue/IDEA-315487/PluginRepositoryAuthProvider-is-broken-in-2022.3-making-custom-repository-authentication-impossible#focus=Comments-27-6990965.0-0

[github-actions]

1. In the RepoAuthHotfix class, the appFrameCreated method is empty. It should contain the code that needs to be executed when the application frame is created. Without any code, the class is unnecessary and can be removed.

2. In the ChangeLogParserTest class, the test method one entry, no previous entries with no italics is missing an assertion. It should verify the expected output of the ChangelogParser.readFile method.

3. In the ChangeLogParserTest class, the test method one entry, no previous entries with no italics can be simplified by removing the unnecessary expectedString variable. The expected output can be directly compared to the result of the ChangelogParser.readFile method.

Here's an example of the changes:

@Test
fun `one entry, no previous entries with no italics`() {
  val input =
    """
    Changelog
    =========

    0.9.17
    ------

    2023-07-07

    - Don't register `RakeDependencies` task on platform projects.
    - Fix configuration cache for Dependency Rake. Note that DAGP doesn't yet support it.
    - Add Dependency Rake usage to its doc.
    - Add missing identifiers aggregation for Dependency Rake. This makes it easier to find and add missing identifiers to version catalogs that dependency rake expects.
      - `./gradlew aggregateMissingIdentifiers -Pslack.gradle.config.enableAnalysisPlugin=true --no-configuration-cache`
    """
      .trimIndent()

  val expectedDate = LocalDate.of(2023, 7, 7)
  val (changeLogString, latestEntry) = ChangelogParser.readFile(input, null)
  assertThat(changeLogString).isEqualTo(input)
  assertThat(latestEntry).isEqualTo(expectedDate)
}

4. In the ChangelogParserNoItalicsTest class, all the test methods can be removed. The functionality of these tests is already covered by the tests in the ChangeLogParserTest class. Having duplicate tests is unnecessary and can be confusing.

5. In the ChangelogParserNoItalicsTest class, the @Test annotation can be removed from the class declaration since there are no test methods remaining.

Here's an example of the changes:

class ChangelogParserNoItalicsTest {
  // All test methods removed
}

By following these steps, the code will be improved by removing unnecessary code and simplifying the tests.

[arpita184]

These changes need to be made in artifactory-authenticator

[kateliu20]

Okay: 3f2536b

[ZacSweers]

Done in #509