feat: add metadata into oci manifest when 'kpm push'

[zong-zhe]

1. Does this PR affect any open issues?(Y/N) and add issue references (e.g. "fix #123", "re #123".):

• N
• Y

Fixed #201

2. What is the scope of this PR (e.g. component or file name):

pkg/oci/oci.go

3. Provide a description of the PR(e.g. more details, effects, motivations or doc link):

• Affects user behaviors
• Contains syntax changes
• Contains variable changes
• Contains experimental features
• Performance regression: Consumes more CPU
• Performance regression: Consumes more Memory
• Other

4. Are there any breaking changes?(Y/N) and describe the breaking changes(e.g. more details, motivations or doc link):

• N
• Y

When the kpm push is executed, some of the data required by AH is filled into the annotation field of the OCI manifest conf.

5. Are there test cases for these changes?(Y/N) select and add more details, references or doc links:

• Unit test
• Integration test
• Benchmark (add benchmark stats below)
• Manual test (add detailed scripts or steps below)
• Other

[coveralls]

Pull Request Test Coverage Report for Build 6609991077

• 3 of 25 (12.0%) changed or added relevant lines in 5 files are covered.
• 2 unchanged lines in 2 files lost coverage.
• Overall coverage decreased (-0.1%) to 36.983%

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Changes Missing Coverage	Covered Lines	Changed/Added Lines	%
pkg/client/client.go	0	1	0.0%
pkg/cmd/cmd_push.go	0	1	0.0%
pkg/package/package.go	0	6	0.0%
pkg/oci/oci.go	0	14	0.0%

Files with Coverage Reduction	New Missed Lines	%
pkg/cmd/cmd_push.go	1	10.08%
pkg/oci/oci.go	1	6.93%

Totals
Change from base Build 6477129858:	-0.1%
Covered Lines:	1233
Relevant Lines:	3334

---

💛 - Coveralls

[Peefy]

LGTM