[fix] #3853: Compare permission token payload as JSON

[mversic]

Description

1. StringWithJson should implement PartialEq comparison as JSON
   this was causing bugs when iroha-java would serialize token payload vs when iroha serde would do so
2. remove DefaultValidator struct from iroha_validator
   it's been used incorrectly, because the delegated method must always call back into original validator whereas calling into DefaultValidator would prevent this. Interestingly, removing DefaultValidator didn't increase code duplication which was the argument for introducing it in the first place
3. removed DoesAccountHavePermissionToken
   As is discussed in [BUG] Eq/Ord for PermissionToken implementations are broken #3857 the comparison of PermissionTokens on the host side is broken and cannot be relied upon. Additionally, there is little reason to think it measurably optimizes the operation of finding a token for an account especially since it's only executed from the validator
4. discovered [BUG] Eq/Ord for PermissionToken implementations are broken #3857

Linked issue

Closes #3853

Benefits

Checklist

• I've read CONTRIBUTING.md
• I've used the standard signed-off commit format (or will squash just before merging)
• All applicable CI checks pass (or I promised to make them pass later)
• (optional) I've written unit tests for the code changes
• I replied to all comments after code review, marking all implemented changes with thumbs up

[coveralls]

Pull Request Test Coverage Report for Build 6038411647

• 33 of 101 (32.67%) changed or added relevant lines in 4 files are covered.
• 5538 unchanged lines in 89 files lost coverage.
• Overall coverage decreased (-1.8%) to 57.664%

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Changes Missing Coverage	Covered Lines	Changed/Added Lines	%
data_model/src/visit.rs	0	5	0.0%
data_model/derive/src/lib.rs	33	39	84.62%
data_model/src/permission.rs	0	11	0.0%
data_model/src/isi.rs	0	46	0.0%

Files with Coverage Reduction	New Missed Lines	%
cli/src/main.rs	1	0.0%
cli/src/torii/pagination.rs	1	98.9%
config/base/src/runtime_upgrades.rs	1	51.72%
config/src/torii.rs	1	96.67%
core/src/smartcontracts/isi/block.rs	1	87.5%
crypto/src/merkle.rs	1	96.23%
data_model/derive/src/partially_tagged.rs	1	99.67%
data_model/src/account.rs	1	52.21%
data_model/src/domain.rs	1	47.37%
logger/src/lib.rs	1	95.15%

Totals
Change from base Build 5423219773:	-1.8%
Covered Lines:	20604
Relevant Lines:	35731

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💛 - Coveralls

[0x009922]

I am not familiar with the changes well. On the shallow look, LGTM. Since this PR is blocking us from rc19 release, I am approving this with fingers crossed.