standard-tests[minor]: Add test for streaming token counts with tools #14419

Job	Run time
Check linting	5m 30s
test-exports / exports-cf	4m 40s
test-exports / exports-cjs	5m 5s
test-exports / exports-esbuild	4m 38s
test-exports / exports-esm	5m 20s
test-exports / exports-tsc	4m 10s
test-exports / exports-vercel	5m 48s
test-exports / exports-vite	4m 23s
	39m 34s

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