Update terminate liveness command

[sitetester]

What was the problem?

This PR resolves #8193

Regarding this point:

Line 126: This test should be reverted. The verify() function throws error when the chain is Live; when it is not live, verification is successful. So, the description should be "should return error if the chain is live" and in line 127 call mockResolvedValue(true).

• line 126: Test title is already updated
• line 127: Already set

describe('verify', () => {
   ...
   beforeEach(async () => {
   ...
       jest.spyOn(interopMod['internalMethod'], 'isLive').mockResolvedValue(true);
       ...
   ....
   });
});

How was it solved?

• Source code updated with latest code changes
• validator.validate check applied

How was it tested?

Relevant test added

[codecov]

Codecov Report

Merging #9063 (1e99a48) into release/6.1.0 (d75cf3a) will decrease coverage by 0.01%.
The diff coverage is 100.00%.

❗ Current head 1e99a48 differs from pull request most recent head 50bca2f. Consider uploading reports for the commit 50bca2f to get more accurate results

@@                Coverage Diff                @@
##           release/6.1.0    #9063      +/-   ##
=================================================
- Coverage          84.33%   84.33%   -0.01%     
=================================================
  Files                652      652              
  Lines              23965    23960       -5     
  Branches            3487     3485       -2     
=================================================
- Hits               20212    20207       -5     
  Misses              3753     3753              

Files	Coverage Δ
...chain/commands/terminate_sidechain_for_liveness.ts	100.00% <100.00%> (ø)
framework/src/modules/interoperability/schemas.ts	100.00% <ø> (ø)

... and 1 file with indirect coverage changes

[gkoumout]

Looks good to me, assuming the verification part is handled consistently with rest of SDK.