"snapcraft plugins" generates different output format based on base
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Issue body
### Bug Description
Depending on which base you select, the "snapcraft plugins" command generates differently-formatted output:
```
$ snapcraft plugins --base=core22
Displaying plugins available for 'core22'
ant
autotools
cmake
dotnet
dump
go
make
maven
meson
nil
npm
python
rust
scons
colcon
conda
flutter
kernel
$ snapcraft plugins --base=core20
Displaying plugins available for 'core20'
autotools catkin-tools colcon crystal go make nil python rust
catkin cmake conda dump kernel meson npm qmake
$
```
### To Reproduce
Run "snapcraft plugins" selecting different bases.
### Environment
Ubuntu 22.04, Snapcraft 7.4.3.
### snapcraft.yaml
```shell
There is no yaml.
```
### Relevant log output
```shell
See output above.
```
### Additional context
_No response_
Evaluation history
No evaluation history available.