package_regex.inc: Cleanup and organize

package_regex.inc: Cleanup and organize

Removed unnecesary entries because now are supported by latest_versionstring
method of bitbake fetcher.

Organized regex'es into categories,

    - REGEX that are special cases.
    - REGEX_URI's for upstream site that don't provide get (403, 404,
      550) support.
    - Python PyPI site and Sourceforge site.
    - GIT REGEX'es that are special cases.

Signed-off-by: Aníbal Limón <anibal.limon@linux.intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>