Implement downloads page and May 25th timed copy changes (#1653)

* Add initial side nav

* Add Download page as a sub-page under Meth&Data

- udpate S3 file path in .envs
- remove the DownloadPacket component
- move download copy from methodology to download
- modify header to use two types of navs:
--  mobile (with sub-pages) and
-- desktop (without subpages)
- create a SubPageNav component
- add SubPagNav to Meth and Download page
- update snapshots
- add global CSS overide to remove minus sign on mobile nav link accordion as it's permanently open

* Remove the update tag above Public eng button

* Make the 3rd bullet on explore page update on 5/25

* Make the RFI box text change after 5/25/22

* Update site with RFI expired copy, remove Alerts

- add Spanish translations
- update snapshots

* Fix typo on XLS file path

* Refactor HowYouCanHelp to standard form

* Add custom download links with icons

- add new DownloadLink compnent
- add Spanish translations

* Update download file sizes

* Allow meth&data nav link to collapse on mobile

client/src/pages/tests/__snapshots__/techSupportDoc.test.tsx.snap

@@ -247,12 +247,43 @@ exports[`rendering of the DatasetContainer checks if various text fields are vis
               <li
                 class="usa-nav__primary-item"
               >
-                <a
-                  data-cy="nav-link-methodology"
-                  href="/en/methodology"
+                <button
+                  aria-controls="methMenu"
+                  aria-expanded="true"
+                  class="usa-accordion__button usa-nav__link"
+                  data-cy="nav-dropdown-methodology"
+                  data-testid="navDropDownButton"
+                  type="button"
                 >
-                  Methodology & data
-                </a>
+                  <span>
+                    Methodology & data
+                  </span>
+                </button>
+                <ul
+                  class="usa-nav__submenu"
+                  id="methMenu"
+                >
+                  <li
+                    class="usa-nav__submenu-item"
+                  >
+                    <a
+                      data-cy="nav-link-methodology"
+                      href="/en/methodology"
+                    >
+                      Methodology & data
+                    </a>
+                  </li>
+                  <li
+                    class="usa-nav__submenu-item"
+                  >
+                    <a
+                      data-cy="nav-link-downloads"
+                      href="/en/downloads"
+                    >
+                      Downloads
+                    </a>
+                  </li>
+                </ul>
               </li>
               <li
                 class="usa-nav__primary-item"
@@ -301,79 +332,6 @@ exports[`rendering of the DatasetContainer checks if various text fields are vis
         </div>
       </div>
     </div>
-    <div
-      class="grid-container-desktop-lg"
-      data-testid="gridContainer"
-    >
-      <div
-        class="usa-alert usa-alert--info"
-        data-testid="alert"
-      >
-        <div
-          class="usa-alert__body"
-        >
-          <h4
-            class="usa-alert__heading"
-          >
-            Additional documentation now available
-          </h4>
-          <p
-            class="usa-alert__text"
-          >
-            Download new 
-            <a
-              class="usa-link usa-link--external"
-              data-cy=""
-              href="https://static-data-screeningtool.geoplatform.gov/data-pipeline/data/score/downloadable/cejst_technical_support_document.pdf"
-              rel="noreferrer"
-              target="_blank"
-            >
-              technical support
-            </a>
-             and other documentation and 
-            <a
-              class="usa-link usa-link--external"
-              data-cy=""
-              href="mailto:Screeningtool-Support@omb.eop.gov"
-              rel="noreferrer"
-              target="_blank"
-            >
-              send feedback
-            </a>
-            .
-          </p>
-        </div>
-      </div>
-      <div
-        class="usa-alert usa-alert--info"
-        data-testid="alert"
-      >
-        <div
-          class="usa-alert__body"
-        >
-          <h4
-            class="usa-alert__heading"
-          >
-            Public comment period extended
-          </h4>
-          <p
-            class="usa-alert__text"
-          >
-            The public comment period for 
-            <a
-              class="usa-link usa-link--external"
-              data-cy=""
-              href="https://www.federalregister.gov/documents/2022/04/25/2022-08774/climate-and-economic-justice-screening-tool-beta-version"
-              rel="noreferrer"
-              target="_blank"
-            >
-              sending feedback
-            </a>
-             via the Request for Information has been extended to May 25, 2022.
-          </p>
-        </div>
-      </div>
-    </div>
   </header>
   <main
     id="main-content"