For some utility functions.

We always call this method with an explicit tag.

To construct a URL, we need options to pass to bottle_filename, so this
method should error out if none are given.

We always call this method with an argument, so we can simplify it.

Improvements to formula/bottle integration means we can be less
defensive here.

This is now handled by requiring that options are always passed to the
installer explicitly.

Defaults can't be specified in the parameter list, as they will be
overwritten by whatever is passed in. Instead the defaults must be
merged with the argument in the method body.

Fixes Homebrew/homebrew#24981.

The BottleCollector collects bottle tags and sha1s, and allows tags
to be fetched using more advanced logic than just fetching identical
tags.

Closes Homebrew/homebrew#23434.

This reverts commit fdf20dc43971b728520d518f3b6ef0bcb16aeb21.

Closes Homebrew/homebrew#24831.
Closes Homebrew/homebrew#24780.

This reverts commit 31bab6e52b7ed8c63421b9c647d0592af2ee2635.

Closes Homebrew/homebrew#23447.

* PPC bottles are in the os_cpu format, e.g. :tiger_g3
* Intel bottles are the bare cat, as usual
* 64-bit bottles have _64 appended to them, e.g. :tiger_g5_64 or :leopard_64