Unified Storage: Make all dashboard fields searchable (#98899)

* wip. adding sprinkles fields.

* some refactoring. Works with sprinkles now.

* exclude top level dashboard hit fields from hit "fields"

* adds unit test for DecodeCell helper

* test can search for specific dashboard fields on bleve index

* adds search handler tests for the fields and tests for fields when transforming the search req to a bleve search req

* fix panic when calling fields.Set() with int32

* adds regression test

* remove unneeded method on test mock client

* fix linter issues

* updates dashboard test data for bleve tests

* remove DASHBOARD_LEGACY_ID from bleve_tests

* dont cast twice

* updates test to sort by dashboard_views_last_1_days

* declare excludedFields outside of function

* fixes sorting by dashboard fields - prepends "fields." to any dashboard fields we try to sort by

* uses map for excludedFields

* expects fields to be array-style url param

* change method name

* fixes failing tests - needed to add column type to mocks

pkg/storage/unified/resource/table_test.go

@@ -1,6 +1,8 @@
 package resource
 
 import (
+	"bytes"
+	"encoding/binary"
 	"fmt"
 	"path/filepath"
 	"strings"
@@ -312,3 +314,15 @@ func TestColumnEncoding(t *testing.T) {
 		require.Empty(t, missingArrays, "missing array tests for types")
 	})
 }
+
+func TestDecodeCell(t *testing.T) {
+	colDef := &ResourceTableColumnDefinition{Type: ResourceTableColumnDefinition_INT64}
+	var buf bytes.Buffer
+	err := binary.Write(&buf, binary.BigEndian, int64(123))
+	require.NoError(t, err)
+
+	res, err := DecodeCell(colDef, 0, buf.Bytes())
+
+	require.NoError(t, err)
+	require.Equal(t, int64(123), res)
+}