Updated self-service e2e tests, to test with session-based authentication

[sshedmake]

Description

• Fixed the authentication session persistence problem self-service E2E tests
• The problem was that tests were using Common.LogintoAAP() which doesn't persist sessions across tests, causing authentication to be lost between test cases
• Replaced Common.LogintoAAP() with Common.LogintoAAPWithSession()
• Handle autocomplete 400 Bad Request errors in self-service E2E tests

Related Issues

Closes AAP-58959

Type of Change

• Bug fix
• New feature
• Breaking change
• Documentation update

[codecov-commenter]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 81.08%. Comparing base (61d4514) to head (abb73e6).

@@           Coverage Diff           @@
##             main      #16   +/-   ##
=======================================
  Coverage   81.08%   81.08%           
=======================================
  Files          95       95           
  Lines        3589     3589           
  Branches      787      787           
=======================================
  Hits         2910     2910           
- Misses        629      669   +40     
+ Partials       50       10   -40     

see 10 files with indirect coverage changes

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