Add button to drop 'unstarted' txs

[Farber98]

Description

Under Settings > Key Managment > EVM Chain Accounts > Admin, we already have a button to “abandon all current transactions”.

When clicked, this button hits the /v2/keys/evm/chain endpoint. It will call the Reset method which ends up calling TxStore Abandon method. If we take a look at the EVM implementation, we can see that this button UPDATES evm.txes table to set as abandoned all transactions that are IN ('unconfirmed', 'in_progress', 'unstarted') states for given evm_chain_id and from_address.

Despite some similarities, we need something different.

Through this PR we are adding a new button that optionally receives a subject as a text field and only drops the 'unstarted' txs. The key differences are that:

• We want to DELETE rather than UPDATE txs to 'abandoned'.
• We are only interested in 'unstarted' txs and not 'unconfirmed'or 'in_progress' ones.
• We want an additional text field to optionally send a subject to the API.

Resources

• Placeholder for the upcoming txmgr PR, actively being worked by Narcis.
• BCI-2563

Steps to Test

1. yarn && yarn setup
2. yarn start
3. ...etc

Checklist

If this PR creates changes to the operator-ui itself, rather than tests, pipeline changes, etc. Then please create a changeset so that a new release is created, and the changelog is updated. See: https://github.com/changesets/changesets/blob/main/docs/adding-a-changeset.md#what-is-a-changeset

• This PR has an accompanying changeset if needed.

[Farber98]

Assuming we keep the ENDPOINT = '/v2/keys/evm/chain' for this button

[cl-sonarqube-production]

Quality Gate failed

Failed conditions
33.3% Coverage on New Code (required ≥ 75%)
3.1% Duplication on New Code (required ≤ 3%)
8 New Major Issues (required ≤ 5)

See analysis details on SonarQube

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