SCBC-483: SDK: Support FTS like Pre-Filters while doing Vector Search

Adding FIT testing.

(And fixing a pre-existing performer bug)

Change-Id: I8d4821a2310c060922876988d8ef14462bf21816
Reviewed-on: https://review.couchbase.org/c/couchbase-jvm-clients/+/228736
Tested-by: Build Bot <[email protected]>
Reviewed-by: David Nault <[email protected]>

Author: programmatix

scala-fit-performer/src/main/scala/com/couchbase/client/performer/scala/search/SearchHelper.scala

@@ -385,7 +385,7 @@ object SearchHelper {
           out = out.should(converted: _*)
         }
         if (qr.getMustNotCount > 0) {
-          val converted = convertSearchQueries(qr.getMustList.asScala)
+          val converted = convertSearchQueries(qr.getMustNotList.asScala)
           out = out.mustNot(converted: _*)
         }
         if (qr.hasShouldMin) out = out.shouldMin(qr.getShouldMin)
@@ -545,6 +545,9 @@ object SearchHelper {
       val opts = vq.getOptions
       if (opts.hasNumCandidates) out = out.numCandidates(opts.getNumCandidates)
       if (opts.hasBoost) out = out.boost(opts.getBoost)
+      // [if:1.9.0]
+      if (opts.hasPrefilter) out = out.prefilter(convertSearchQuery(opts.getPrefilter))
+      // [end]
     }
     out
   }

scala-fit-performer/src/main/scala/com/couchbase/client/performer/scala/util/Capabilities.scala

@@ -86,6 +86,10 @@ object Capabilities {
     out.add(Caps.SDK_BUCKET_SETTINGS_NUM_VBUCKETS)
     // [end:1.8.2]
 
+    // [start:1.9.0]
+    out.add(Caps.SDK_PREFILTER_VECTOR_SEARCH)
+    // [end:1.9.0]
+
     out
   }