Is there any way to get list of all possible filter hooks for all post types?
Not automatically.
You don’t know a filter exists until something tries to add it or runs it, and you have no guarantee what that filter is for without docs or a human being to describe it.
You can do this by hand for core itself as it’s well documented what the filters are, but there isn’t a generic way to do this for 3rd party plugins/themes that provide custom filters.
A particular plugin might use filter names that are consistent enough to guess things but you would need to identify and cater to that plugin on a case by case basis.
You also have no way of knowing which filters are for frontend HTML. For example, code that tries to do this automatically might pick up filters for saving content or sending API requests that then break things. A lot of filters also run on both the frontend and the admin.
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