core[patch]: Allow runnable tools to take single string/`ToolCall` inputs #14556

Job	Run time
Check linting	5m 16s
test-exports / exports-esbuild	4m 46s
test-exports / exports-cf	5m 3s
test-exports / exports-cjs	4m 57s
test-exports / exports-esm	4m 45s
test-exports / exports-tsc	4m 9s
test-exports / exports-vercel	5m 50s
test-exports / exports-vite	4m 27s
	39m 13s

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