Optimise `zio.http.endpoint.Endpoint.implementHandler` #17466

Job	Run time
Build and Test (ubuntu-latest, 2.12.19, graal_graalvm@17)	8m 31s
Build and Test (ubuntu-latest, 2.12.19, graal_graalvm@21)	8m 13s
Build and Test (ubuntu-latest, 2.12.19, temurin@17)	9m 3s
Build and Test (ubuntu-latest, 2.12.19, temurin@21)	8m 5s
Release Drafter (ubuntu-latest, 2.13.10, temurin@8)	5s
Build and Test (ubuntu-latest, 2.13.14, graal_graalvm@17)	11m 5s
Build and Test (ubuntu-latest, 2.13.14, graal_graalvm@21)	10m 58s
Build and Test (ubuntu-latest, 2.13.14, temurin@17)	12m 41s
Build and Test (ubuntu-latest, 2.13.14, temurin@21)	10m 40s
Build and Test (ubuntu-latest, 3.3.3, graal_graalvm@17)	8m 0s
Build and Test (ubuntu-latest, 3.3.3, graal_graalvm@21)	7m 41s
Build and Test (ubuntu-latest, 3.3.3, temurin@17)	8m 22s
Mima Check (ubuntu-latest, 2.13.10, temurin@21)	1m 48s
Build and Test (ubuntu-latest, 3.3.3, temurin@21)	7m 31s
Unsafe Scoverage (ubuntu-latest, 2.13.14, temurin@8)	6m 7s
Jmh CachedDateHeaderBenchmark	0s
Jmh ClientBenchmark	0s
Jmh CookieDecodeBenchmark	0s
Jmh EndpointBenchmark	0s
Jmh HttpCombineEval	0s
Jmh HttpCollectEval	0s
Jmh HttpNestedFlatMapEval	0s
Jmh HttpRouteTextPerf	0s
Jmh ProbeContentTypeBenchmark	0s
Jmh SchemeDecodeBenchmark	0s
Jmh ServerInboundHandlerBenchmark	0s
Jmh UtilBenchmark	0s
Performance Benchmarks (SimpleEffectBenchmarkServer) (ubuntu-latest, 2.13.14, temurin@8)	7m 50s
Performance Benchmarks (PlainTextBenchmarkServer) (ubuntu-latest, 2.13.14, temurin@8)	8m 8s
Cache Jmh benchmarks	0s
Publish Artifacts	0s
	2h 14m 48s

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