mesa/formats: remove compressed formats from matching function

mesa/formats: remove compressed formats from matching function

All compressed formats return GL_FALSE and there isn't any evidence to
support that this behaviour would change. Remove all switch cases for
compressed formats.

v2. Since the exhaustive switch is removed, add a gtest to ensure
    all formats are handled.
v3. Ensure that GL_NO_ERROR is set before returning.
v4. Fix an arg to _mesa_uncompressed_format_to_type_and_comps();
    fix formatting and misc improvements (Chad).

Reviewed-by: Chad Versace <chad.versace@intel.com>
Signed-off-by: Nanley Chery <nanley.g.chery@intel.com>