Fixes deprecations of renderPlain() & getName()

[kedarkhaire]

Fixes a part of #1130 Once released, will fix few deprecations of https://github.com/apigee/apigee-m10n-drupal/issues/529

[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 43.42%. Comparing base (e9acb4a) to head (78a4391). Report is 1 commits behind head on 4.x.

Additional details and impacted files

@@            Coverage Diff            @@
##                4.x    #1136   +/-   ##
=========================================
  Coverage     43.42%   43.42%           
  Complexity     3052     3052           
=========================================
  Files           342      342           
  Lines         11149    11149           
=========================================
  Hits           4841     4841           
  Misses         6308     6308           

Files with missing lines	Coverage Δ
...es/apigee_edge_teams/src/TeamPermissionHandler.php	90.54% <100.00%> (ø)
src/Entity/ListBuilder/AppListBuilder.php	97.29% <100.00%> (ø)

... and 682 files with indirect coverage changes

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