Added "Last Report Date" to Portfolio Overview "Project Status" view

[Petterandre]

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Description

Adds:
GtLastReportDate column and adds to ProjectStatus CT.
Adds element to Prosjektkolonner list with ID 30
Adds ID 30 to default "Project Status" view
Adds "Created" date to title on Project status page. (Will be used later in Snapshots)
Updates the field when clicking on "Publish report" in project.

How to test

1. Create a new project report.
2. Publish the report.
3. View SitePages/Porteføljeoversikt.aspx

Relevant issues (if applicable)

Closes #393

Note:
Does not use "Modified" date from the list element, meaning it does not work retroactively for already published documents as per suggestion in the issue.
💔Thank you!

[olemp]

@Petterandre can you resolve conflicts

[Petterandre]

@Petterandre can you resolve conflicts

@olemp Done and Done.

[pzljanb]

Error when no previous reports. Has to be handled.

[pzljanb]

Handled nicely in new PR 👍