fix: custom scalar original error propagation

[n1ru4l]

(backport graphql/graphql-js#3837; graphql/graphql-js@076972e)

[changeset-bot]

🦋 Changeset detected

Latest commit: 202c7aa

The changes in this PR will be included in the next version bump.

This PR includes changesets to release 1 package

Name	Type
@graphql-tools/executor	Patch

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🚀 Snapshot Release (alpha)

The latest changes of this PR are available as alpha on npm (based on the declared changesets):

Package	Version	Info
@graphql-tools/executor	1.2.8-alpha-20240701102746-202c7aaecb164c160cd1754ac109ab9efaae7343	npm ↗︎ unpkg ↗︎

[github-actions]

✅ Benchmark Results

     ✓ no_errors
     ✓ expected_result

     checks.........................: 100.00% ✓ 300       ✗ 0  
     data_received..................: 35 MB   3.5 MB/s
     data_sent......................: 128 kB  13 kB/s
     http_req_blocked...............: avg=4.59µs  min=2.13µs   med=2.9µs    max=215.78µs p(90)=4.61µs   p(95)=4.86µs  
     http_req_connecting............: avg=859ns   min=0s       med=0s       max=128.87µs p(90)=0s       p(95)=0s      
     http_req_duration..............: avg=62.37ms min=52.48ms  med=56.94ms  max=151.63ms p(90)=87.17ms  p(95)=92.65ms 
       { expected_response:true }...: avg=62.37ms min=52.48ms  med=56.94ms  max=151.63ms p(90)=87.17ms  p(95)=92.65ms 
     http_req_failed................: 0.00%   ✓ 0         ✗ 150
     http_req_receiving.............: avg=192.5µs min=113.25µs med=141.99µs max=6.94ms   p(90)=167.66µs p(95)=180.33µs
     http_req_sending...............: avg=27.24µs min=20.66µs  med=25.79µs  max=98.06µs  p(90)=33.07µs  p(95)=36.97µs 
     http_req_tls_handshaking.......: avg=0s      min=0s       med=0s       max=0s       p(90)=0s       p(95)=0s      
     http_req_waiting...............: avg=62.15ms min=52.32ms  med=56.75ms  max=151.15ms p(90)=86.99ms  p(95)=92.47ms 
     http_reqs......................: 150     14.965023/s
     iteration_duration.............: avg=66.79ms min=56.12ms  med=61.13ms  max=155.72ms p(90)=92.6ms   p(95)=98.22ms 
     iterations.....................: 150     14.965023/s
     vus............................: 1       min=1       max=1
     vus_max........................: 1       min=1       max=1

[github-actions]

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