ROU-4571: Set custom tooltip on ColumnGroup

[OS-giulianasilva]

This PR is to fix the issue with the custom tooltip when used in a Grid with Column Group

What was happening

• When using the custom tooltip in a Grid with Column Group, the tooltip was not placed in the right column.
• The issue was that the column index returned by Wijmo cannot be used to get the column on the OSDG side when using a Grid with Column Group, because Wijmo does not consider the Column Group as it is done on OSDG side.
• Example: The "Price Tooltip" should have been placed in the Price column instead of the Stock column.
  

What was done

• Changed the Tooltip _setHeaderTooltip method to use the binding instead of the column index to get the column configs.
• Created a new file to place the constants used in the file
• Added a method to set the Column Group header tooltip
• Exposed the tooltip as a Data Grid feature
  • This is necessary so the developer can use the new setColumnGroupHeaderTooltip method

Test Steps

1. Add a Grid with a Column Group
2. Add a custom tooltip to one of the columns
3. In runtime, check that the custom tooltip is placed in the correct column.

Checklist

• tested locally
• documented the code
• clean all warnings and errors of eslint
• requires changes in OutSystems (if so, provide a module with changes)
• requires new sample page in OutSystems (if so, provide a module with changes)

[sonarcloud]

Kudos, SonarCloud Quality Gate passed!   

0 Bugs
0 Vulnerabilities
0 Security Hotspots
0 Code Smells

No Coverage information
0.0% Duplication

[rugoncalves]

Good job @OS-giulianasilva!!!