Document running it tests from intellij IDE

[TSFenwick]

Document how to run integration tests from IntelliJ IDE

Description

Document how to run Integration Tests from IntelliJ IDE

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Key changed/added classes in this PR

• integration-tests/README.md

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This PR has:

• been self-reviewed.
  • using the concurrency checklist (Remove this item if the PR doesn't have any relation to concurrency.)
• added documentation for new or modified features or behaviors.
• added Javadocs for most classes and all non-trivial methods. Linked related entities via Javadoc links.
• added or updated version, license, or notice information in licenses.yaml
• added comments explaining the "why" and the intent of the code wherever would not be obvious for an unfamiliar reader.
• added unit tests or modified existing tests to cover new code paths, ensuring the threshold for code coverage is met.
• added integration tests.
• been tested in a test Druid cluster.

[vtlim]

Suggested change

	A prerequisite to run tests from intellij you need a cluster up and running. Modify the run configuration's `VM options`
	to the values below.
	Before running tests from IntelliJ, ensure you have a Druid cluster running.
	In IntelliJ, edit configurations to add the following VM options:

[TSFenwick]

Reads a lot better. Will just make slight naming changes to make sure it matches exactly with intellij's naming

[vtlim]

Suggested change

	and to run the test you need to run the test from the test configuration often times found around the top right corner
	Run tests from the test configuration found in the top right corner of the IDE.

Is there a certain icon or menu item to look for?

[FrankChen021]

I was looking for such guidance for a long time when I first started my work in Druid.
Thanks for your great work @TSFenwick

[FrankChen021]

I merged this because the failed CI has nothing to do with the doc change in this PR.