RFC: Simplify `flytekit.Resources` #6107

Job	Run time
test-bootstrap	2m 43s
build-and-push-single-binary-image	5m 26s
sandbox-bundled-offloaded-functional-tests	7m 41s
sandbox-bundled-functional-tests	7m 23s
build-and-push-sandbox-bundled-image	0s
	23m 13s

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