Rename _closure to _static_closure, apply naming consistently.

Summary:
In preparation for indirecting all references to closures,
we rename _closure to _static_closure to ensure any old code
will get an undefined symbol error.  In order to reference
a closure foobar_closure (which is now undefined), you should instead
use STATIC_CLOSURE(foobar).  For convenience, a number of these
old identifiers are macro'd.

Across C-- and C (Windows and otherwise), there were differing
conventions on whether or not foobar_closure or &foobar_closure
was the address of the closure.  Now, all foobar_closure references
are addresses, and no & is necessary.

CHARLIKE/INTLIKE were not changed, simply alpha-renamed.

Part of remove HEAP_ALLOCED patch set (#8199)

Depends on D265

Signed-off-by: Edward Z. Yang <ezyang@mit.edu>

Test Plan: validate

Reviewers: simonmar, austin

Subscribers: simonmar, ezyang, carter, thomie

Differential Revision: https://phabricator.haskell.org/D267

GHC Trac Issues: #8199

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