[QA] [Improvement] Add "data-testid" attributes to simplify elements search in automated tests

[tsadovska]

Please add "data-testid" attributes to elements that are used in automated tests.

• data-testid="source-section-select-network-button"

• data-testid="source-section-connect-wallet-button"

• data-testid="source-section-select-asset-button"

• data-testid="source-section-amount-input"

• data-testid="source-section-balance-text"

• data-testid="destination-section-select-network-button"

• data-testid="destination-section-connect-wallet-button"

• data-testid="destination-section-asset-text"

• data-testid="destination-section-amount-input"

• data-testid="destination-section-balance-text"

• data-testid="automatic-route-option"

• data-testid="manual-route-option"

• data-testid="approve-button"

• data-testid="approve-error-message"

• data-testid="redeem-screen-header"

• data-testid="source-section-scan-link"

• data-testid="destination-section-scan-link"

• data-testid="transaction-complete-message"

• data-testid="transaction-error-message"

• data-testid="claim-error-message"

• data-testid="destination-section-scan-link-error-message"