use `skip_deps_check?` instead of `ignore_deps?` hack

We previously set `ignore_deps?` as true for DependencyInstaller to
avoid duplicated dependencies resolution. (See a9fc82aea30506eeacbddeb8b53fb85de8acb9d4)

However, this will cause problem when pouring bottle of a dependency is
failed. In this case, it will try to build dependency from source but
failed due to uninstalled build deps for this formula.

Another disadvantage for using `ignore_deps?` hack is we cannot
distinguish users passing `--ignore-dependencies` flag from we are in
`DependencyInstaller`.

So, let's differentiate these using `skip_deps_check?`

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