Rename web_hook_calls column to web_hook_calls_high

What does this MR do and why?

When we introduced stepped limits to web_hook_calls, we added two columns, web_hook_calls_min and web_hook_calls_high. This left the existing column named web_hook_calls. We are now renaming it web_hook_calls_high for consistency.

Closes #364750 (closed)

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