feat(GlColumnChart): Add 2nd Y-axis for column and stacked column chart

What does this MR do?

Updates the column and stacked-column components to provide props for a secondary Y axis, the secondary axis is specified using an optional prop and has the same structure as the data provided for bars or lines introduced in !1703 (merged).

• Adds the secondaryData prop
• Adds the secondaryDataTitle prop

Screenshots

Stacked column	Stacked line	Column	Column + line

Does this MR meet the acceptance criteria?

Conformity

• Code review guidelines.
• GitLab UI's contributing guidlines.
• If it changes a Pajamas-compliant component's look & feel, the MR has been reviewed by a UX designer.
• If it changes GitLab UI's documentation guidelines, the MR has been reviewed by a Technical Writer.
• If the MR changes a component's API, integration MR(s) have been opened in the following projects to ensure that the @gitlab/ui package can be upgraded quickly after the changes are released:
  • GitLab: mr_url
  • Customers Portal: mr_url
  • Status Page: mr_url
• Added the ~"component:*" label(s) if applicable.

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
• Security reports checked/validated by a reviewer from the AppSec team

Closes #932 (closed)