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

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

How Has This Been Tested?

• [x] accounts_test.go
• [x] Manually testing a thor solo instance
• [x] 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:

• [x] My code follows the style guidelines of this project
• [x] I have performed a self-review of my code
• [x] I have commented my code, particularly in hard-to-understand areas
• [x] I have made corresponding changes to the documentation
• [x] My changes generate no new warnings
• [x] I have added tests that prove my fix is effective or that my feature works
• [x] New and existing unit tests pass locally with my changes
• [x] New and existing E2E tests pass locally with my changes
• [x] Any dependent changes have been merged and published in downstream modules
• [x] 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 :warning:
api/utils/revisions.go	93.93%	1 Missing and 1 partial :warning:

Additional details and impacted files

```diff @@ 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