feat: Viettel Cloud secrets manager

[hoangndst]

What type of PR is this?

/kind feature

What this PR does / why we need it:

Integrate Viettel KMS with kusion to be able to use secrets at Viettel Cloud

Which issue(s) this PR fixes:

Fixes #

Special notes for your reviewer:

Does this PR introduce a user-facing change?

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

[coveralls]

Pull Request Test Coverage Report for Build 10374610615

Details

• 216 of 421 (51.31%) changed or added relevant lines in 6 files are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage decreased (-0.03%) to 52.515%

---

Changes Missing Coverage	Covered Lines	Changed/Added Lines	%
pkg/secrets/providers/viettelcloud/secretsmanager/fake/fake.go	13	16	81.25%
pkg/workspace/validation.go	1	14	7.14%
pkg/secrets/providers/viettelcloud/secretsmanager/secretsmanager.go	56	86	65.12%
pkg/secrets/providers/viettelcloud/vclient/request.go	58	96	60.42%
pkg/secrets/providers/viettelcloud/vclient/response.go	42	100	42.0%
pkg/secrets/providers/viettelcloud/vclient/client.go	46	109	42.2%

Totals
Change from base Build 10302040287:	-0.03%
Covered Lines:	8957
Relevant Lines:	17056

---

💛 - Coveralls

[SparkYuan]

@hoangndst Please add more unit tests to improve the test coverage as it has decreased a lot. The test coverage of your PR should not decrease more than 0.3%

[hoangndst]

I have added unit tests to this PR.
cc @SparkYuan @liu-hm19

[SparkYuan]

lgtm