test: updated abort controller test expected error message based on undici version

[bizob2828]

Description

CI was failing after the 6.3.0 release of undici.

# Subtest: should add errors to transaction when external segment exists
        ok 1 - segment "ROOT" should have child "External/localhost:33941/delay/1000"
        ok 2 - should be equal
        not ok 3 - should be equal
          ---
          compare: ===
          at:
            line: 244
            column: 11
            file: requests.tap.js
          stack: |
            requests.tap.js:244:11
          source: |2
                    t.equal(tx.exceptions.length, 1)
                    t.equal(tx.exceptions[0].error.message, 'Request aborted')
            ----------^
                    tx.end()
                    t.end()
          diff: |
            --- expected
            +++ actual
            @@ -1,1 +1,1 @@
            -Request aborted
            +This operation was aborted
          ...
        
        1..3
        # failed 1 of 3 tests

Looks like generic error on aborted request changes. This PR updates that to handle it accordingly.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (10762a7) 97.02% compared to head (2075a9b) 97.02%.
Report is 1 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1935      +/-   ##
==========================================
- Coverage   97.02%   97.02%   -0.01%     
==========================================
  Files         215      215              
  Lines       40240    40239       -1     
==========================================
- Hits        39041    39040       -1     
  Misses       1199     1199              

Flag	Coverage Δ
integration-tests-16.x	78.92% <ø> (+0.01%)	⬆️
integration-tests-18.x	79.17% <ø> (-0.02%)	⬇️
integration-tests-20.x	79.19% <ø> (ø)
unit-tests-16.x	91.10% <ø> (+<0.01%)	⬆️
unit-tests-18.x	91.08% <ø> (+<0.01%)	⬆️
unit-tests-20.x	91.08% <ø> (+<0.01%)	⬆️
versioned-tests-16.x	73.96% <ø> (-0.03%)	⬇️
versioned-tests-18.x	73.98% <ø> (-0.03%)	⬇️
versioned-tests-20.x	73.99% <ø> (-0.03%)	⬇️

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