Refactor assertion jsonfile

[outofxxx]

• remove a1~a11 json file
• add credential.json template
• update ts-test(@Verin1005)

[codecov-commenter]

Codecov Report

Merging #1400 (e3f6fda) into dev (5b3dbb0) will decrease coverage by 0.17%.
The diff coverage is 0.00%.

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@@            Coverage Diff             @@
##              dev    #1400      +/-   ##
==========================================
- Coverage   19.32%   19.15%   -0.17%     
==========================================
  Files         267      268       +1     
  Lines       12427    12532     +105     
==========================================
  Hits         2401     2401              
- Misses      10026    10131     +105     

Impacted Files	Coverage Δ
tee-worker/app-libs/stf/src/stf_sgx.rs	0.00% <ø> (ø)
tee-worker/app-libs/stf/src/trusted_call.rs	0.00% <0.00%> (ø)
...ves/attestation-handler/src/attestation_handler.rs	0.00% <0.00%> (ø)
...orker/core-primitives/node-api/metadata/src/lib.rs	0.00% <ø> (ø)
tee-worker/core-primitives/types/src/extrinsics.rs	0.00% <ø> (ø)
tee-worker/core-primitives/types/src/lib.rs	0.00% <ø> (ø)
...ndirect-calls-executor/src/executor/call_worker.rs	0.00% <0.00%> (ø)
...-calls-executor/src/executor/litentry/batch_all.rs	0.00% <0.00%> (ø)
...-executor/src/executor/litentry/create_identity.rs	0.00% <0.00%> (ø)
...tor/src/executor/litentry/get_scheduled_enclave.rs	0.00% <0.00%> (ø)
... and 20 more

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[jingleizhang]

All looks good now, thanks!

[jingleizhang]

As the failing CI General CI / tee-test (demo-indirect-invocation) (pull_request) is known to us, I will re-run it then merge the codes.