support slash repository

[zhangguanzhang]

Describe the bug

https://github.com/goharbor/harbor/blob/f910c5654baf64a090f5b423ee6990d9f9adbc61/api/v2.0/swagger.yaml#L6242

To Reproduce
Steps to reproduce the behavior.

docker pull alpine
docker tag alpine  harbor.mydomain.com/project/a/b:latest
docker push harbor.mydomain.com/project/a/b:latest

List tags for 'project/a/b' error: [GET /projects/{project_name}/repositories/{repository_name}/artifacts][404] listArtifactsNotFound  &{Errors:[0xc0003be7c0]}

while delete the tag, will requested the a/b not a%252Fb , ref https://github.com/goharbor/harbor/blob/f910c5654baf64a090f5b423ee6990d9f9adbc61/api/v2.0/swagger.yaml#L6242

Expected behavior
A clear and concise description of what you expected to happen.

Log files (optional)
If applicable, add log files to help explain your problem.

Environment:

• goharbor-client version
• goharbor version
• OS
• Other

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