add_vline not rendering properly with secondary y-axis

Hello,

I encountered a problem, when using add_vline with a secondary y-axis and no data on it.

plotly.py version: 5.5.0

Minimum example:

import plotly.graph_objects as go
from plotly.subplots import make_subplots

fig = make_subplots(
    specs=[[{"secondary_y": True}]],
)

# Uncomment the line below to "fix" the problem
# fig.add_trace(go.Scatter(x=[0, 1], y=[2, 3]), secondary_y=False)
fig.add_trace(go.Scatter(x=[4, 5], y=[6, 10]), secondary_y=True)
# Change secondary_y to True to also "fix" the problem
fig.add_vline(4.5, exclude_empty_subplots=False, secondary_y=False)

Expected behavior:
The add_vline should a vertical line to the plot no matter if it has traces or not. How the plot looks like, when following the second comment.

Best regards
Julian

先使用 plotly.py 5.5.0 執行 issue 中的最小範例，並檢查主要座標軸沒有資料時 add_vline 的行為。將結果與註解掉的 trace 以及 secondary_y=True 的情況進行比較；當垂直線即使在所要求的座標軸沒有 trace 時也能渲染到該座標軸上，就表示完成。