fix: clean the name of CI_COMMIT_TAG for RC tags (#309)

Description

Clean the name of CI_COMMIT_TAG from the leading "v" letter for RC tags to make the name of images and CLI binaries more consistent

Related issue

#309 (closed)

Examples

Checklist

• the MR description has been reviewed
• this MR contains text changes and they have been reviewed OR there are no texts changes
• this MR contains GUI/CLI changes and they have been reviewed OR there are no GUI/CLI changes
• this MR contains API changes, specifications reflect those changes and they have been reviewed OR there are no API changes