Update channel member notify props to use native JSON (#18114)

* Update channel member notify props to use native JSON

Created a new store method that patches the notify props field.

https://community-daily.mattermost.com/plugins/focalboard/workspace/zyoahc9uapdn3xdptac6jb69ic?id=285b80a3-257d-41f6-8cf4-ed80ca9d92e5&v=495cdb4d-c13a-4992-8eb9-80cfee2819a4&c=91d08676-4a0e-4f02-8dce-d24d4fc56449

```release-note
NONE
```

* cleanup

```release-note
NONE
```

* forgot to commit

```release-note
NONE
```

* Fix edge case

```release-note
NONE
```

* address review comments

```release-note
NONE
```

* fix incorrect order

```release-note
NONE
```

* Address review comments

```release-note
NONE
```

Co-authored-by: Mattermod <mattermod@users.noreply.github.com>

store/sqlstore/utils_test.go

@@ -6,6 +6,7 @@ package sqlstore
 import (
 	"testing"
 
+	"github.com/stretchr/testify/assert"
 	"github.com/stretchr/testify/require"
 )
 
@@ -103,3 +104,32 @@ func TestRemoveNonAlphaNumericUnquotedTerms(t *testing.T) {
 		})
 	}
 }
+
+func TestMySQLJSONArgs(t *testing.T) {
+	tests := []struct {
+		props     map[string]string
+		args      []interface{}
+		argString string
+	}{
+		{
+			props: map[string]string{
+				"desktop": "linux",
+				"mobile":  "android",
+				"notify":  "always",
+			},
+			args:      []interface{}{"$.desktop", "linux", "$.mobile", "android", "$.notify", "always"},
+			argString: "?, ?, ?, ?, ?, ?",
+		},
+		{
+			props:     map[string]string{},
+			args:      nil,
+			argString: "",
+		},
+	}
+
+	for _, test := range tests {
+		args, argString := constructMySQLJSONArgs(test.props)
+		assert.ElementsMatch(t, test.args, args)
+		assert.Equal(t, test.argString, argString)
+	}
+}