Improve the presentation of "multi-values" in DejaCode Reports

[DennisClark]

Currently when we have a Report Query that returns a field with multiple values (for instance multiple tags for a license), they are presented as a list of values separated by commas such as in True, False, True, True
When two columns have similarly "aligned" values such as a license key, it is therefore hard to see which license has which tag:

Component License                Redistribution
ABC       apache-2.0,            False, False,
          mit, bsd,              False, True
          gpl-2.0

An alternative approach would be to separate each of the multi-values with a new line instead of a comma, enabling us to present a visual alignment of the values:

Component License                Redistribution
ABC       apache-2.0             False
          mit                    False
          bsd                    False
          gpl-2.0                True

Note that the solution is a bit complicated because of the multiple Report output formats supported:

• the DejaCode UI preview of the Report
• the export formats: doc, html, json, xls, xlsx (the default), and yaml.

Any solution needs to work with all supported formats.

[tdruez]

Changes:

• "," replaced by new line for doc, html, xls, xlsx formats
• for json

"license__name": [
  "Apache License 2.0",
  "Apache License 1.1"
]

• for yaml

license__name:
    - Apache License 2.0
    - Apache License 1.1

[DennisClark]

@tdruez I reviewed several impacted reports on staging starship. It all looks good to me, thanks.

[tdruez]

Merged and deployed.