Add Harvester v0.3.0 Release

Add Harvester v0.3.0-rc2 release

Bump luet-makeiso version to 0.3.8

Older version of luet-makeiso does not support changing `boot_file`,
`boot_catalog`, `and isohybrid_mbr`, which are required for Grub2.

Signed-off-by: John Liu <john.liu@suse.com>

Add Harvester v0.3.0 preview1 release

Bump installer to v0.1.8

Bump release to v0.2.0-rc5

Fix ui path

Bump harvester release version

Bump release to v0.2.0-rc2

Update v0.2.0-rc1 release tag