Terms Filter not applying Execution on all overloads

[TruffleMuffin]

The Terms Filter is not applying Execution when specified on all of its overloads. This causes broken behaviour when attempting to do non default filtering with Terms.

For Example:

.Filter(f => f.Terms(t => t.Property, new string[] { "term1" }, TermsExecution.And))

Executes

{
  "filter": {
    "terms": { "property": [ "term1" ] }
  }
}

Instead of

{
  "filter": {
    "terms": { "property": [ "term1" ] },
    "execution": "and"
  }
}