[MM-20979] Add first implementation of the Bleve search engine (#14562)

* [MM-20979] Add first implementation of the Bleve search engine

* Fix i18n

* Migrate searchengine utils tests

* Fix linter

* Don't add allTermsQ if both termQueries and notTermQueries are empty

* Fix test that should work if user is system admin

* Modify naming according to review comments

* Abstract getIndexDir function

* Extracting bleve engine name as a constant

* Merge both Indexer interfaces into one

* Add worker stopped message

* Allow worker to be started/stopped with config change

* Use constants for index names

* Modify test order

* Fix linter

* Trying to unlock the CI

vendor/github.com/RoaringBitmap/roaring/serialization.go

@@ -0,0 +1,34 @@
+package roaring
+
+import (
+	"encoding/binary"
+	"io"
+
+	"github.com/tinylib/msgp/msgp"
+)
+
+// writeTo for runContainer16 follows this
+// spec: https://github.com/RoaringBitmap/RoaringFormatSpec
+//
+func (b *runContainer16) writeTo(stream io.Writer) (int, error) {
+	buf := make([]byte, 2+4*len(b.iv))
+	binary.LittleEndian.PutUint16(buf[0:], uint16(len(b.iv)))
+	for i, v := range b.iv {
+		binary.LittleEndian.PutUint16(buf[2+i*4:], v.start)
+		binary.LittleEndian.PutUint16(buf[2+2+i*4:], v.length)
+	}
+	return stream.Write(buf)
+}
+
+func (b *runContainer16) writeToMsgpack(stream io.Writer) (int, error) {
+	bts, err := b.MarshalMsg(nil)
+	if err != nil {
+		return 0, err
+	}
+	return stream.Write(bts)
+}
+
+func (b *runContainer16) readFromMsgpack(stream io.Reader) (int, error) {
+	err := msgp.Decode(stream, b)
+	return 0, err
+}