[ENG-15045] add `--linker` and copyfile fallback for isolated installs
Merged
DY
1y ago+613+613+012345678901234567890123456789-121-121-012345678901234567890123456789
What does this PR do?
- Packages will be installed by copying files when hardlink or clonefile received XDEV
- Added
--linker=isolatedand--linker=hoisted - fixes progress bar for isolated installs
- fixes counting installed packages for the install summary
How did you verify your code works?
Added tests for install backends and --linker