[api] readState support to non-rolldpos mode

[envestcc]

Description

STANDALONE and NOOP is easy to use than ROLLDPOS in writing e2etest, and readState is used to checking things in testing. But it's only supported in ROLLDPOS.

Fixes #(issue)

Type of change

Please delete options that are not relevant.

• [x] Code refactor or improvement

How Has This Been Tested?

Please describe the tests that you ran to verify your changes. Provide instructions so we can reproduce. Please also list any relevant details for your test configuration

• [] make test
• [] fullsync
• [] Other test (please specify)

Test Configuration:

• Firmware version:
• Hardware:
• Toolchain:
• SDK:

Checklist:

• [] My code follows the style guidelines of this project
• [] I have performed a self-review of my code
• [] I have commented my code, particularly in hard-to-understand areas
• [] I have made corresponding changes to the documentation
• [] My changes generate no new warnings
• [] I have added tests that prove my fix is effective or that my feature works
• [] New and existing unit tests pass locally with my changes
• [] Any dependent changes have been merged and published in downstream modules

[sonarcloud[bot]]

Quality Gate failed

Failed conditions
7.9% Duplication on New Code (required ≤ 3%)

See analysis details on SonarCloud

[codecov[bot]]

Codecov Report

Attention: Patch coverage is 75.00000% with 2 lines in your changes are missing coverage. Please review.

Project coverage is 76.97%. Comparing base (cc526cd) to head (33382b8). Report is 5 commits behind head on master.

Files	Patch %	Lines
api/coreservice.go	75.00%	1 Missing and 1 partial :warning:

Additional details and impacted files

```diff @@ Coverage Diff @@ ## master #4247 +/- ## ========================================== - Coverage 77.02% 76.97% -0.05% ========================================== Files 342 343 +1 Lines 29406 29438 +32 ========================================== + Hits 22651 22661 +10 - Misses 5650 5670 +20 - Partials 1105 1107 +2 ```

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