debug: add new validator roles in debug page and endorsement info

[Trisfald]

Quick change to improve the debug experience of statelessnet. Changes are scoped to the EpochInfo/Validators page.

• Validators can now have multiple roles: chunk validator, chunk producer, block producer. Note: I haven't included the role Block validator from NEP-509 because I don't fully understand if it's useful nor how to compute this role
• Chunks column renamed -> Produced Chunks
• New column -> Endorsed Chunks

[Trisfald]

new look:

[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 71.66%. Comparing base (642f6a0) to head (c389892).

Additional details and impacted files

```diff @@ Coverage Diff @@ ## master #11673 +/- ## ========================================== - Coverage 71.67% 71.66% -0.02% ========================================== Files 788 788 Lines 161374 161374 Branches 161374 161374 ========================================== - Hits 115669 115648 -21 - Misses 40672 40691 +19 - Partials 5033 5035 +2 ``` | [Flag](https://app.codecov.io/gh/near/nearcore/pull/11673/flags?src=pr&el=flags&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=near) | Coverage Δ | | |---|---|---| | [backward-compatibility](https://app.codecov.io/gh/near/nearcore/pull/11673/flags?src=pr&el=flag&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=near) | `0.23% <ø> (ø)` | | | [db-migration](https://app.codecov.io/gh/near/nearcore/pull/11673/flags?src=pr&el=flag&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=near) | `0.23% <ø> (ø)` | | | [genesis-check](https://app.codecov.io/gh/near/nearcore/pull/11673/flags?src=pr&el=flag&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=near) | `1.36% <ø> (ø)` | | | [integration-tests](https://app.codecov.io/gh/near/nearcore/pull/11673/flags?src=pr&el=flag&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=near) | `37.87% <ø> (+0.01%)` | :arrow_up: | | [linux](https://app.codecov.io/gh/near/nearcore/pull/11673/flags?src=pr&el=flag&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=near) | `69.06% <ø> (-0.02%)` | :arrow_down: | | [linux-nightly](https://app.codecov.io/gh/near/nearcore/pull/11673/flags?src=pr&el=flag&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=near) | `71.16% <ø> (-0.01%)` | :arrow_down: | | [macos](https://app.codecov.io/gh/near/nearcore/pull/11673/flags?src=pr&el=flag&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=near) | `52.64% <ø> (+1.56%)` | :arrow_up: | | [pytests](https://app.codecov.io/gh/near/nearcore/pull/11673/flags?src=pr&el=flag&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=near) | `1.59% <ø> (ø)` | | | [sanity-checks](https://app.codecov.io/gh/near/nearcore/pull/11673/flags?src=pr&el=flag&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=near) | `1.39% <ø> (ø)` | | | [unittests](https://app.codecov.io/gh/near/nearcore/pull/11673/flags?src=pr&el=flag&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=near) | `66.25% <ø> (-0.01%)` | :arrow_down: | | [upgradability](https://app.codecov.io/gh/near/nearcore/pull/11673/flags?src=pr&el=flag&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=near) | `0.28% <ø> (ø)` | | Flags with carried forward coverage won't be shown. [Click here](https://docs.codecov.io/docs/carryforward-flags?utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=near#carryforward-flags-in-the-pull-request-comment) to find out more.

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