The --show-source help claimed JSON/YAML output 'always includes' the
source field, but releaseElement.Source is tagged json:"source,omitempty"
so it is omitted when a release has no recorded source. Reword the help to
state the flag affects only table output and that JSON/YAML emit source
whenever a release has one.
Also add cmd-level get metadata coverage for a release whose chart records
meta.helm.sh/release-source, with table/JSON/YAML golden files, so the new
SOURCE line and source field do not regress.
Signed-off-by: Shaan Satsangi <shaansatsangi@gmail.com>
Shaan Satsangi
57667c932c