Versionless support for featureUtility

[cbridgha]

Changes to featureUtility resolution and overall support for versionless features.

The following command is required to be supported

featureUtility installServerFeatures <server name>

installServerFeatures knows the complete set of features being used, and uses the normal kernel resolution code to work out what features to install.

The list of features returned by installServerFeatures, should be a "resolved" list of "versioned" features, and "should" not require any special handling for "version-less" features. But needs to be tested

We are NOT supporting:

$ ./featureUtility installFeature <versionless feature>. Other than an error message should appear

Currently - if a versionless feature exists in the repo it shows this message:
$ ./featureUtility installFeature mpHealth --verify=all
CWWKF1250I: The following assets already exist: [mpHealth]. They will not be reinstalled. To modify an existing feature, you must manually uninstall it first.

This needs to change to always fail for versionless... like what we show for a feature not found or possibly a new message...

$ ./featureUtility installFeature mpConfig --verify=all
Initializing ...
Using 8 threads to download artifacts.
CWWKF1409E: Unable to find the following feature

[cbridgha]

Part of #25704

[cbridgha]

Merged PR's for this issue:

• Repository Changes: Adding platforms to ESA #28973, Versionless Repo Resolver additions and Error handling #29058
• featureUtility changes: Versionless prep for install #28981,Install errors and messages #29060