Remove fuzzy matching from VSD label filter

Problem

• Follow-up to #460112 (closed)
• Blocked by #465547 (closed)

Description

Label filters applied to custom VSDs should match the exact label title, instead of the current behaviour of fuzzy matching labels.

Solution

Update filter_labels_query_builder.js to use title instead of searchTerm/searchIn.

Use the following query: #465547 (comment 2079911659)

{
  group(fullPath: FULL_PATH) {
    id
    labels(title: LABEL_TITLE, includeAncestorGroups: true, includeDescendantGroups: true) {
      nodes {
        id
        title
        color
      }
    }
  }
}