Array.range trusts NumericRange.count

[som-snytt]

Fixes #24877

[som-snytt]

Ha! Scala.js was bug-compatible! I believe I just deleted the skip directive from the test.

[som-snytt]

Probably there is a procedure for mitigating flaky tests. This is a repeat offender. Timeout tests are inherently flaky and need at least some gesture toward retry with backoff.

[123-0] + requests.ModelTests.multipart file uploads should contain application/octet-stream content type 209ms  
[123-0] Tests: 1, Passed: 1, Failed: 0
[123-1] + requests.RequestTests.matchingMethodWorks 459ms  
[123-1] + requests.RequestTests.params.get 39ms  
[123-1] + requests.RequestTests.multipart 20ms  
[123-1] + requests.RequestTests.cookies.session 21ms  
[123-1] + requests.RequestTests.cookies.raw 18ms  
[123-1] + requests.RequestTests.cookies.space 20ms  
[123-1] + requests.RequestTests.redirects.max 77ms  
[123-1] + requests.RequestTests.redirects.maxRelative 76ms  
[123-1] + requests.RequestTests.test_reproduction 3ms  
[123-1] + requests.RequestTests.streaming 13ms  
[123-1] + requests.RequestTests.timeouts.read 3023ms  requests.TimeoutException: Request to http://localhost:32777/delay/3 timed out. (readTimeout: 2000, connectTimout: 10000)
[123-1] + requests.RequestTests.timeouts.connect 38ms  requests.TimeoutException: Request to https://httpbin.org/delay/1 timed out. (readTimeout: 10000, connectTimout: 1)
[123-1] X requests.RequestTests.failures 537ms 
[123-1]   requests.RequestFailedException: Request to https://doesnt-exist.com/ failed with status code 403