Description of problem:

A11Y moderate issues found for the Data Science Projects page

1. Data Science Projects -> Project Details: Heading levels should only increase by one

2. Data Science Projects -> Project Details -> Workbenches -> Add storage: Document should not have more than one banner landmark

3. Data Science Projects -> Project Details -> Workbenches -> Create/Edit Workbench: Heading levels should only increase by one

4. Data Science Projects -> Project Details -> Workbenches -> Delete Workbench: Document should not have more than one banner landmark

5. Data Science Projects -> Project Details -> Workbenches -> Stop Workbench: Document should not have more than one banner landmark

6. Data Science Projects -> Project Details -> Cluster storage -> Add/Edit Cluster Storage: Document should not have more than one banner landmark

7. Data Science Projects -> Project Details -> Data Connections -> Add/Edit Data Connection: Document should not have more than one banner landmark

8. Data Science Projects -> Project Details -> Data Connections -> Change connected workbenches: Document should not have more than one banner landmark

9. Data Science Projects -> Project Details -> Data Connections -> Delete Data Connection: Document should not have more than one banner landmark

10. Data Science Projects -> Project Details -> Models and model servers -> Deploy model: Document should not have more than one banner landmark

11. Data Science Projects -> Project Details -> Models and model servers -> Delete Deploy model: Document should not have more than one banner landmark

12. Data Science Projects -> Project Details -> Models and model servers -> Edit model server: Document should not have more than one banner landmark

13. Data Science Projects -> Project Details -> Models and model servers -> Delete model server: Document should not have more than one banner landmark

Prerequisites (if any, like setup, operators/versions):

Steps to Reproduce

1. Navigate to the Data Science Projects page
2. Scan the page using the AXE Dev Tool Chrome extension

Actual results:

AXE Tool shows the issue as moderate.

Expected results:

AXE Tool shows the issue is resolved.

Reproducibility (Always/Intermittent/Only Once):

Always

Build Details: 

v1.20.1-8

Workaround:

N/A

Additional info:

Reproduction/Verification:

• Install AXE Dev Tools Chrome extension.
• Open AXE Dev Tools on the page you want to scan. Use the free version or sign up for the PRO 7-day trial to use the "Scan PART of my page" feature.
• Scan the entire page or part of it where the bug was found.
• Once the bug is fixed, do the AXE scan again to verify the fix.
• Add a screenshot to this ticket where AXE Scan no longer shows the error.