Tie stage events height to stage nav height

What does this MR do?

Ensures the height of the stage events table matches the maximum height of the list of stages (stage nav)

Related to #35823 (closed)

Testing

You might need to seed some data: #36649 (closed)

1. Navigate to http://localhost:3001/-/analytics/value_stream_analytics
2. Select a group, observe the height of the stage events table
3. Change the filters (select a new group, adjust date range)
4. The stage events table should never be smaller / bigger than the list of events, overflow still occurs when there are too many events for the height of the table.

Screenshots

Before	After

Does this MR meet the acceptance criteria?

Conformity

• Changelog entry
• Documentation (if required)
• Code review guidelines
• Merge request performance guidelines
• Style guides
• Database guides
• Separation of EE specific content

Availability and Testing

• Review and add/update tests for this feature/bug. Consider all test levels. See the Test Planning Process.
• Tested in all supported browsers
• Informed Infrastructure department of a default or new setting change, if applicable per definition of done

Security

If this MR contains changes to processing or storing of credentials or tokens, authorization and authentication methods and other items described in the security review guidelines:

• Label as security and @ mention @gitlab-com/gl-security/appsec
• The MR includes necessary changes to maintain consistency between UI, API, email, or other methods
• Security reports checked/validated by a reviewer from the AppSec team