fix(massiveaction): fix PDF export redirecting to item list

[MyvTsv]

• I have performed a self-review of my code.
• I have added tests (when available) that prove my fix is effective or that my feature works.
• I have updated the CHANGELOG with a short functional description of the fix or new feature.
• This change requires a documentation update.

Description

• It fixes !43434
• Here is a brief description of what this PR does
  When using the “Export PDF” MassiveAction, the redirect to the PDF file may not occur. This fix removes the echo from the <script> tag and uses the setRedirect() method of the MassiveAction class to perform the redirect

Screenshots (if appropriate):