fix(core-database): remove delegate registration expression

[sebastijankuzner]

Summary

Remove the delegateRegistrationExpression, because it is unnecessary expression. Generated query is already comparing senderPublicKey.

Expression:

{
    op: "or",
    expressions: [
        { property: "senderPublicKey", op: "equal", value: "456" },
        { property: "recipientId", op: "equal", value: "123" },
        {
            op: "and",
            expressions: [
                { property: "typeGroup", op: "equal", value: Enums.TransactionTypeGroup.Core },
                { property: "type", op: "equal", value: Enums.TransactionType.MultiPayment },
                { property: "asset", op: "contains", value: { payments: [{ recipientId: "123" }] } },
            ],
        },
        {
            op: "and",
            expressions: [
                { property: "typeGroup", op: "equal", value: Enums.TransactionTypeGroup.Core },
                { property: "type", op: "equal", value: Enums.TransactionType.DelegateRegistration },
                { property: "senderPublicKey", op: "equal", value: "456" },
            ],
        },
    ],
}

can be shorten to:

{
    op: "or",
    expressions: [
        { property: "senderPublicKey", op: "equal", value: "456" },
        { property: "recipientId", op: "equal", value: "123" },
        {
            op: "and",
            expressions: [
                { property: "typeGroup", op: "equal", value: Enums.TransactionTypeGroup.Core },
                { property: "type", op: "equal", value: Enums.TransactionType.MultiPayment },
                { property: "asset", op: "contains", value: { payments: [{ recipientId: "123" }] } },
            ],
        },
    ],
}

because we already use:

{ property: "senderPublicKey", op: "equal", value: "456" },

and removed expression can only return the subset of that expressions.

Checklist

• Tests (if necessary)
• Ready to be merged