Release v0.2.1

What's Changed

• feat: add frontend group by @daviderli614 in #244
• chore: add policy to delete configmap by @daviderli614 in #249
• test: change data path in testdata by @daviderli614 in #251
• fix(docs): bad link by @daviderli614 in #253
• chore: add virtual_host_style for s3 storage by @daviderli614 in #255
• feat: configure cache capacity and rename oss secret-access-key to access-key-secret by @daviderli614 in #257
• chore: add common pvc label to the datanode by @daviderli614 in #254
• feat: add scripts for cleaning cluster and data collection by @daviderli614 in #252
• feat: add frontend ingress by @daviderli614 in #248
• feat: Add ValidatingWebhook to verify CR resource validity by @daviderli614 in #256

Full Changelog: v0.2.0...v0.2.1