Use `declare` instead of `def-edebug-spec` in most places

Use `declare` instead of `def-edebug-spec` in most places

* lisp/speedbar.el: Use lexical-binding.
(speedbar-with-writable): Use `declare`.

* lisp/subr.el (def-edebug-spec): Use `declare`.

* lisp/cedet/ede/base.el: Use lexical-binding.
(ede-with-projectfile): Use `declare`.
(recentf-exclude): Declare var.

* lisp/cedet/ede/pmake.el: Use lexical-binding.
(ede-pmake-insert-variable-shared, ede-pmake-insert-variable-once):
Use `declare`.

* lisp/cedet/ede/proj-comp.el: Use lexical-binding.
(ede-compiler-begin-unique, ede-compiler-only-once)
(ede-linker-begin-unique, ede-linker-only-once): Use `declare`.

* lisp/cedet/semantic/ctxt.el: Use lexical-binding.
(semantic-with-buffer-narrowed-to-context)
(semantic-with-buffer-narrowed-to-command): Use `declare`.
(semantic--progress-reporter): Declare var.
(semantic-ctxt-end-of-symbol-default): Remove unused var `fieldsep`.

* lisp/cedet/semantic/lex-spp.el: Use lexical-binding.
(define-lex-spp-macro-declaration-analyzer)
(define-lex-spp-include-analyzer, semantic-lex-with-macro-used)
(define-lex-spp-macro-undeclaration-analyzer): Use `declare`.
(semantic-lex-spp-symbol-remove): Rename arg to avoid colliding with
dynamic variable `obarray`.
(semantic-lex-spp-symbol-pop): Remove unused var `oldvalue`.
(semantic-lex-spp-lex-text-string): Remove unused var `analyzer`.

* lisp/cedet/semantic/lex.el (define-lex)
(semantic-lex-unterminated-syntax-protection, define-lex-analyzer)
(define-lex-regex-analyzer, define-lex-block-analyzer)
(semantic-lex-catch-errors): Use `declare`.

* lisp/cedet/semantic/tag.el: Use lexical-binding.
(semantic-with-buffer-narrowed-to-current-tag)
(semantic-with-buffer-narrowed-to-tag): Use `declare`.

* lisp/cedet/semantic/wisent.el: Use lexical-binding.
(define-wisent-lexer): Use `declare`.

* lisp/emacs-lisp/cl-lib.el (cl-pushnew): The arg to :test can be any
form not just function form.

* lisp/org/ob-comint.el (org-babel-comint-in-buffer)
(org-babel-comint-with-output): Use `declare`.

* lisp/org/ob-core.el (org-babel-map-src-blocks): Use `declare`.
(org-babel-result-cond): Simplify edebug spec.

* lisp/org/org-clock.el (org-with-clock-position, org-with-clock):
* lisp/org/org-agenda.el (org-agenda-with-point-at-orig-entry):
* lisp/org/ob-tangle.el (org-babel-with-temp-filebuffer): Use `declare`.

* lisp/textmodes/rst.el (push): Remove redundant edebug spec.

* lisp/vc/pcvs-parse.el: Use lexical-binding.
(cvs-parse-buffer): Rename arg to avoid dynbound conflict.
(cvs-or): Use `declare`.