Display the y-axis on the range of data value in the chart

What does this MR do?

In order to display more relevant data to the user, the range of the y axis displayed is now set to follow the data dynamically, instead of starting at 0.

Additionally, the deployment data is moved to a separate axis to avoid impacting that dynamic range. This surfaced a bug as the tooltip is not shown for the deployment data, addressed separately here: gitlab-ui!1080 (merged)

Screenshots

For the same dataset, the change is quite visible:

before (y axis minimum is 0)	after (y axis minimum changes with the data)

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

Closes #202696 (closed)