(perform-replace): Remove bindings of global

(perform-replace): Remove bindings of global
variables isearch-string, isearch-regexp, isearch-case-fold-search.
Add three new arguments to `replace-highlight'.
(replace-highlight): Add arguments string, regexp, case-fold.
Let-bind isearch-string, isearch-regexp, isearch-case-fold-search
to allow isearch-lazy-highlight-new-loop to use these values
to set corresponding isearch-lazy-highlight-... internal
variables whose values lazy highlighting will use regardless of
changes to global variables isearch-string, isearch-regexp,
isearch-case-fold-search during lazy highlighting loop.
(replace-dehighlight): Rename `isearch-lazy-highlight-cleanup'
to `lazy-highlight-cleanup'.