style: normalize some annotations

[healthjyk]

What type of PR is this?

cleanup

What this PR does / why we need it:

normalize annotations

Special notes for your reviewer:

None

Does this PR introduce a user-facing change?

None

Additional documentation e.g., design docs, usage docs, etc.:

None

[coveralls]

Pull Request Test Coverage Report for Build 5751106857

• 0 of 0 changed or added relevant lines in 0 files are covered.
• 29 unchanged lines in 3 files lost coverage.
• Overall coverage increased (+0.2%) to 72.607%

---

Files with Coverage Reduction	New Missed Lines	%
pkg/engine/backend/backend.go	1	60.0%
pkg/cmd/preview/options.go	12	84.31%
pkg/generator/kcl/kcl_generator.go	16	80.92%

Totals
Change from base Build 5678670143:	0.2%
Covered Lines:	5113
Relevant Lines:	7042

---

💛 - Coveralls

[adohe]

please squash before we can merge.

[SparkYuan]

lgtm