Refactoring install scripts and docs

[quetric]

• consolidate installation steps
• provide cleanup script
• validate LSF is usable for full end-to-end build

[github-actions]

Coverage

component	covered	total		vs dev
linker	1540	3863	39.9%	no change
vrt	10889	14340	75.9%	no change
vrtd	1490	4512	33.0%	no change

_{Lines covered at 26575ba, compared with the most recent successful dev run. Full HTML reports are attached to the test runs as artifacts.}