State: add HTTPState as a new StateStorage

[SparkYuan]

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

• N
• Y

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

pkg/engine/states

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

Add the HttpState backend to provide a generic way to manipulate State in third-party services

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

• N
• Y

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

Test cases in pkg/engine/states/http_state_test.go

6. Release note

Please refer to Release Notes Language Style Guide to write a quality release note.

Add HTTPState as a new StateStorage

[coveralls]

Coverage decreased (-0.05%) to 73.49% when pulling db2cb81 on SparkYuan:main into fd58099 on KusionStack:main.

[adohe]

Generally LGTM. But there still remains some aspect of optimization, for example: re-org the package, uniform the state_storage concept and backend.

[elliotxx]

lgtm