feat: add certificate management v2 API endpoints (#181)

* feat: integrate the v2 endpoints for instructor dashboard certificates tab

* feat: remove exception and remove invalidation

* fix: remove unused imports and vars

* fix: tests

* fix: tests

* feat: expand test coverage

* fix: linting

* feat: expand test coverage

* feat: test coverage

* fix: mock data

* fix: tests

* feat: PR feedback

* feat: Refactor certificates module to use absolute imports and improve data handling

* fix: tests

Author: wgu-jesse-stewart

src/certificates/CertificatesPage.scss

@@ -79,3 +79,12 @@
     z-index: 1;
   }
 }
+
+.certificates-toolbar-wrapper {
+  min-width: 0;
+}
+
+.certificates-search-field {
+  min-width: 320px;
+  max-width: 400px;
+}