Fix PCT failures when running against Jenkins 2.249+

[dwnusbaum]

Description

This PR fixes three tests that are failing in the PCT when running against Jenkins 2.249:

• TryBlueOceanMenuTest.testOpenBlueOcean: Issue is that [JENKINS-61973] Restyle sidebar tasks jenkins#4700 changed the styling of the sidebar links, and as a result the class attribute has a space at the end now (to make it easier to add a class under certain conditions).
• PipelineNodeTest.submitInputPostBlock: Underlying issue is JENKINS-63516. This test doesn't really have anything to do with password parameters specifically, so we just remove the password parameter from the test to fix the PCT failures.
• PipelineNodeTest.submitInputPostBlockWithParallelStages: Same as PipelineNodeTest.submitInputPostBlock.

Submitter checklist

• Link to JIRA ticket in description, if appropriate.
• Change is code complete and matches issue description
• Appropriate unit or acceptance tests or explanation to why this change has no tests
• Reviewer's manual test instructions provided in PR description. See Reviewer's first task below.

Reviewer checklist

• Run the changes and verified the change matches the issue description
• Reviewed the code
• Verified that the appropriate tests have been written or valid explanation given