Add custom agent reasoning effort across SDKs (#1981) #3076

Job	Run time
Node.js SDK Tests (macos-latest, default)	4m 0s
Node.js SDK Tests (windows-latest, default)	6m 36s
Node.js SDK Tests (macos-latest, inprocess)	3m 46s
Node.js SDK Tests (windows-latest, inprocess)	7m 47s
Node.js SDK Tests (ubuntu-latest, inprocess)	3m 42s
Node.js SDK Tests (ubuntu-latest, default)	2m 52s
	28m 43s

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