feat: add support for 'finalized' revision in accounts

[darrenvechain]

Description

This PR allows clients to specify finalized as a revision on the accounts endpoints.

The solo instance is also modified to return the best block as the finalized block

Type of change

• New feature (non-breaking change which adds functionality)

How Has This Been Tested?

• accounts_test.go
• Manually testing a thor solo instance
• Manually @ https://mainnet.blue.dev.node.vechain.org/doc/stoplight-ui/#/paths/accounts-address/get

curl --request GET \
  --url 'https://mainnet.blue.dev.node.vechain.org/accounts/0x3504c0089Ce44d5709BB97a957EC40C76F18dCdA?revision=best' \
  --header 'Accept: application/json, text/plain'
  
  
curl --request GET \
  --url 'https://mainnet.blue.dev.node.vechain.org/accounts/0x3504c0089Ce44d5709BB97a957EC40C76F18dCdA?revision=finalized' \
  --header 'Accept: application/json, text/plain'

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
• New and existing E2E tests pass locally with my changes
• Any dependent changes have been merged and published in downstream modules
• I have not added any vulnerable dependencies to my code

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 94.87179% with 4 lines in your changes are missing coverage. Please review.

Project coverage is 61.64%. Comparing base (0489d6a) to head (7d7f067).
Report is 3 commits behind head on master.

Files	Patch %	Lines
api/api.go	0.00%	2 Missing ⚠️
api/utils/revisions.go	93.93%	1 Missing and 1 partial ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #689      +/-   ##
==========================================
+ Coverage   61.37%   61.64%   +0.26%     
==========================================
  Files         194      195       +1     
  Lines       18223    18246      +23     
==========================================
+ Hits        11184    11247      +63     
+ Misses       5958     5904      -54     
- Partials     1081     1095      +14     

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[nwbrettski]

Add finalized to:

• transactions endpoint
• debug trace call endpoint

Add documentation clarifying what finalized means:

• 360 blocks
• 2 rounds of BFT

[libotony]

Add finalized to:

• transactions endpoint
• debug trace call endpoint

Add documentation clarifying what finalized means:

• 360 blocks
• 2 rounds of BFT

Had a discussion with @darrenvechain, transaction's endpoint does not need finalized, it used to only accept blockID or null

[libotony]

Do not forget to sync the version thor.yaml with cmd/thor/VERSION @darrenvechain since we got changes in the API spec