Bump up version to v1.7.5 (goharbor#7260)

Signed-off-by: wang yan <wangyan@vmware.com>

Merge pull request goharbor#7049 from reasonerjt/license-v1.7.4

Update the OSL for v1.7.4

Bump up release version to v1.7.3 (goharbor#6916)

Signed-off-by: wang yan <wangyan@vmware.com>

Merge pull request goharbor#6821 from reasonerjt/bump-up-172

Bump up to 1.7.2

Promote version to v1.7.1 (goharbor#6695)

Signed-off-by: wang yan <wangyan@vmware.com>

Merge pull request goharbor#6495 from kofj/doc_for_build_history (goh…

…arbor#6560)

[Cherry-Pick] update user_guide about the build history.

Signed-off-by: Frank Kung <kfanjian@gmail.com>

Enable package migrator into offline installer (goharbor#6520)

This commit is to enable migrator v1.7.0, and package it in the packaging
process.

Signed-off-by: wang yan <wangyan@vmware.com>

Merge pull request goharbor#6502 from wy65701436/release-1.6.0

Promote release version v1.6.3

Merge pull request goharbor#6470 from cd1989/retag-problem

Give meaningful error messages when retag is forbidden

Merge pull request goharbor#6300 from wy65701436/release-1.6.0

Promote version to v1.6.2