Enhance `toIdsOf(String fieldToExtract)` and `toValuesOf(String fieldToExtract)` [release v6.8.0]

[konwron]

Describe the solution you'd like
toIdsOf and toValuesOf methods currently fetch all records from database.
If you include COUNT(Id) query function in this query, number of query rows drops drastically, to the size of returned Set.
And there are basically no downsides.

private Set<Id> toIdsOf(String fieldToExtract) {
	// https://salesforce.stackexchange.com/questions/393308/get-a-list-of-one-column-from-a-soql-result
	this.builder.fields.clearAllFields(); // other fields not needed
	this.with('COUNT(Id)');
	this.with(fieldToExtract, 'Id');
	this.groupBy(fieldToExtract);
	this.builder.conditions.addMasterCondition(Filter.with(fieldToExtract).isNotNull());

	return new Map<Id, SObject>(this.toAggregated(fieldToExtract)).keySet();
}