standard-tests[minor]: Add tests for parallel tool calls #15001

Job	Run time
Check linting	1m 40s
platform-compatibility (ubuntu-latest)	1m 41s
platform-compatibility (windows-latest)	1m 25s
platform-compatibility (macos-latest)	1m 44s
test-exports / exports-esbuild	1m 40s
test-exports / exports-esm	1m 43s
test-exports / exports-cf	1m 40s
test-exports / exports-cjs	1m 38s
test-exports / exports-vercel	1m 38s
test-exports / exports-tsc	1m 41s
test-exports / exports-vite	1m 41s
	18m 11s

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