Jenkins: improve consistency of naming of build directories

[GRyall]

As a developer I would like us to name our build directories (within \Kits$\CompGroup\ICP) consistently.

Currently most builds are in directories of the form of 'build-#', whilst client_E4 creates directories of the form 'build#' (i.e. without the dash). It would be good for this to be consistent and this would allow the simplification of the script to check stale builds as well.

Acceptance Criteria

• New builds int he client_E4 directory are cretaed in folders named in the fomat 'build-#'
• The check on stale builds is simplified to remove the hard coded exception and the logic also simplified to take advantage of this havingbeen removed.
• any scripts in ibex_utils that get the latest build of cleint_E4 are updated to look for a directory witha dash in the name

Extra Information

How to Test

verbose instructions for reviewer to test changes
(Add before making a PR)
Time in planning 00:19 23/5/24