Identify when using static runtime - #10437

Changelog: Feature: Add is_msvc_static_runtime method to conan.tools.microsoft.visual to identify when using msvc with static runtime.
Docs: conan-io/docs#2372

Related to discussion #10424 (comment)

The idea here helping static runtime identification and simplifying conditions in recipes, where can result in a prone error. Example:

def validate(self):
    if is_msvc_static_runtime(self) and self.options.shared:
        raise ConanInvalidConfiguration("Shared option is not well supported with static runtime on Windows")

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