[BUG] Update streaming interfaces through deeply nested funtions

[AdrianLiu00]

Describe the bug
When updating the streaming interface in .to(), if the inner function is deeply nested, the interface may be not exposed to update.

To Reproduce

def test_deep_nested_function():
    T = int32

    def func1(A: T[10, 20], B: T[10, 20]):
        for i, j in allo.grid(10, 20):
            B[i, j] = A[i, j] + 1

    def func2(A: T[10, 20], B: T[10, 20]):
        func1(A, B)
        for i, j in allo.grid(10, 20):
            B[i, j] = A[i, j] * 2

    def func3(A: T[10, 20], B: T[10, 20]):
        func2(A, B)
        for i, j in allo.grid(10, 20):
            B[i, j] = A[i, j] - 1

    def top(A: T[10, 20]) -> T[10, 20]:
        B: T[10, 20]
        func3(A, B)
        return B

    s = allo.customize(top)
    s.to(s.B, "top", depth=1)
    print(s.module)

Buggy output
test_deep_nested_function - hcl_mlir._mlir_libs._site_initialize.<locals>.MLIRError: Failure while executing pass pipeline:

Expected behavior
All related interfaces are well-updated and pass the mlir test.

Additional context
Sufficient recursive traversal can be a solution to this issue.