MLE-4163: robot tests enhancements

[barkhachoithani]

Description

Checklist:

• Owner:

• JIRA_ID as part of branch/PR name

• Rebase the branch with upstream

• Squashed all commits into a single commit

• Added Tests

• Reviewer:

• Reviewed Tests

• Added to Release Wiki/Jira

[Copilot]

Pull request overview

Enhances the Robot Framework test suite metadata and readability for the MarkLogic Docker images by adding consistent tags/documentation and tightening minor formatting in shared keywords.

Changes:

• Added [Tags] and expanded [Documentation] for many test cases in test/docker-tests.robot to better classify scenarios (e.g., docker-run, compose, positive/negative, long_running).
• Normalized some compose YAML path usage in tests (e.g., ./compose-test-*.yaml) for consistency when running under make docker-tests (which executes from test/).
• Minor whitespace/formatting adjustments in test/keywords.resource (compose readiness loop and request header dictionary formatting).

Reviewed changes

Copilot reviewed 1 out of 2 changed files in this pull request and generated 3 comments.

File	Description
test/keywords.resource	Small formatting tweaks in compose startup/readiness logic and CA-certificate header creation.
test/docker-tests.robot	Adds consistent tags and richer per-test documentation; normalizes some compose file path usage.