Core: Use internal server to test requests passthrough #10927

Job	Run time
Caching (3.8)	10s
Caching (3.9)	7s
Caching (3.10)	13s
Caching (3.11)	7s
Caching (3.12)	6s
Caching (3.13)	15s
Linting (3.8)	3m 42s
Linting (3.9)	3m 42s
Linting (3.10)	3m 16s
Linting (3.11)	2m 52s
Linting (3.12)	2m 58s
Linting (3.13)	2m 58s
jstest / test	1m 10s
javatest / test	1m 10s
dotnettest / test	1m 31s
rubytest / test (3.3)	1m 3s
terraformexamplestest / Find Jobs	5s
testproxy / test (ubuntu-latest, 3.10)	4m 27s
testserver / test (3.8)	18m 30s
testproxy / test (ubuntu-latest, 3.11)	4m 10s
testserver / test (3.9)	18m 49s
testproxy / test (ubuntu-latest, 3.12)	4m 25s
testserver / test (3.10)	16m 30s
test / test (3.8)	17m 14s
testproxy / test (windows-latest, 3.10)	5m 37s
testserver / test (3.11)	17m 0s
test / test (3.9)	17m 24s
testproxy / test (windows-latest, 3.11)	6m 37s
testserver / test (3.12)	17m 28s
test / test (3.10)	17m 18s
testproxy / test (windows-latest, 3.12)	6m 56s
test / test (3.11)	16m 44s
test / test (3.12)	17m 37s
test / test (3.13)	17m 3s
terraformexamplestest / test (acm)	4m 26s
terraformexamplestest / test (autoscaling)	2m 53s
terraformexamplestest / test (awslambda)	3m 48s
terraformexamplestest / test (cloudfront)	3m 54s
terraformexamplestest / test (codebuild)	2m 46s
terraformexamplestest / test (ds)	3m 50s
terraformexamplestest / test (ec2)	3m 21s
terraformexamplestest / test (elb)	3m 45s
terraformexamplestest / test (iam)	2m 37s
terraformexamplestest / test (rds)	4m 10s
terraformexamplestest / test (route53)	3m 57s
terraformexamplestest / test (sqs)	3m 31s
terraformexamplestest / test (wafv2)	3m 21s
	4h 55m 33s

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