Add transaction state changes feature

[sl1depengwyn]

#5583
#6288

Changelog

Add tab with state changes to transaction page that show how balances changed. Some examlpes below:

• tx
  
• tx
  
  In case of multiple transfers of unique tokens of the same contranct all of them diaplayed in one change
• tx
  
  Here balance of contract(0x09C131) is unknown, so it isn't displayed

Checklist for your Pull Request (PR)

• I added an entry to CHANGELOG.md with this PR
• If I added new functionality, I added tests covering it.
• If I fixed a bug, I added a regression test to prevent the bug from silently reappearing again.
• I checked whether I should update the docs and did so by submitting a PR to https://github.com/blockscout/docs
• If I added/changed/removed ENV var, I submitted a PR to https://github.com/blockscout/docs to update the list of env vars at https://github.com/blockscout/docs/blob/master/for-developers/information-and-settings/env-variables.md and I updated the version to master in the Version column. Changes will be reflected in this table: https://docs.blockscout.com/for-developers/information-and-settings/env-variables.
• If I add new indices into DB, I checked, that they are not redundant with PGHero or other tools

[sl1depengwyn]

These are imported by use Explorer.Schema

blockscout/apps/explorer/lib/explorer/schema.ex

Lines 4 to 12 in e23653f

	defmacro __using__(_opts) do
	quote do
	use Ecto.Schema
	import Ecto.{Changeset, Query}
	@timestamps_opts [type: :utc_datetime_usec]
	end
	end

[vbaranov]

@sl1depengwyn when I click to any tx's tab except State changes scroll jumps to tab's content. It would be awesome to keep the same behaviour for State changes tab as well.

[vbaranov]

@sl1depengwyn also, what is the order of state changes?

[vbaranov]

@sl1depengwyn tx failed, but state change asserting transfer of the coin value, what is incorrect:

[sl1depengwyn]

@sl1depengwyn also, what is the order of state changes?

first 3 entries are coin from, to and miner and then all token transfers changes, token transfers changes unordered since stored in Map, but grouped by address

[sl1depengwyn]

@sl1depengwyn when I click to any tx's tab except State changes scroll jumps to tab's content. It would be awesome to keep the same behaviour for State changes tab as well.

fixed

[sl1depengwyn]

@sl1depengwyn tx failed, but state change asserting transfer of the coin value, what is incorrect:

fixed

[vbaranov]

@sl1depengwyn 1 test failed:

1) test GET index/3 returns fetched state changes for the transaction with token transfer (BlockScoutWeb.TransactionStateControllerTest)
Error:      test/block_scout_web/controllers/transaction_state_controller_test.exs:33
     Expected truthy, got false
     code: assert String.contains?(full_text, format_wei_value(%Wei{value: Decimal.new(1, 2, 18)}, :ether))
     arguments: