Prefer defface's ':weight bold' to obsolete alias ':bold t'

Prefer defface's ':weight bold' to obsolete alias ':bold t'

* etc/themes/adwaita-theme.el (adwaita):
* etc/themes/manoj-dark-theme.el (manoj-dark):
* etc/themes/modus-themes.el (modus-themes-faces):
* lisp/gnus/gnus-srvr.el (gnus-server-agent, gnus-server-cloud)
(gnus-server-opened, gnus-server-denied, gnus-server-offline):
* lisp/gnus/gnus.el (gnus-group-news-1, gnus-group-news-2)
(gnus-group-news-3, gnus-group-news-4, gnus-group-news-5)
(gnus-group-news-6, gnus-group-news-low, gnus-group-mail-1)
(gnus-group-mail-2, gnus-group-mail-3, gnus-group-mail-low-empty)
(gnus-group-mail-low, gnus-summary-high-ticked)
(gnus-summary-high-ancient, gnus-summary-high-undownloaded)
(gnus-summary-high-unread, gnus-summary-high-read):
* lisp/gnus/message.el (message-header-to, message-header-cc)
(message-header-subject, message-header-newsgroups)
(message-header-other, message-header-name, message-header-xheader)
(message-separator, message-cited-text-1, message-cited-text-2)
(message-cited-text-3, message-cited-text-4, message-mml)
(message-signature-separator):
* lisp/mh-e/mh-e.el (mh-face-data, mh-folder-cur-msg-number)
(mh-speedbar-folder-with-unseen-messages)
(mh-speedbar-selected-folder-with-unseen-messages):
* lisp/net/dictionary.el (dictionary-button-face):
* lisp/org/org-faces.el (org-drawer, org-tag, org-list-dt, org-todo)
(org-done, org-headline-todo, org-formula, org-agenda-structure)
(org-scheduled, org-scheduled-today, org-scheduled-previously)
(org-upcoming-deadline):
* lisp/proced.el (proced-uninterruptible-sleep-status-code)
(proced-executable, proced-cpu, proced-user, proced-time-colon):
* lisp/progmodes/erts-mode.el (erts-mode-specification-name)
(erts-mode-specification-value):
* lisp/progmodes/prolog.el (prolog-font-lock-keywords):
* lisp/progmodes/verilog-mode.el (verilog-font-lock-p1800-face)
(verilog-font-lock-ams-face)
(verilog-font-lock-grouping-keywords-face):
* lisp/progmodes/vhdl-mode.el (vhdl-font-lock-prompt-face)
(vhdl-font-lock-attribute-face, vhdl-font-lock-enumvalue-face)
(vhdl-font-lock-function-face, vhdl-font-lock-directive-face)
(vhdl-font-lock-reserved-words-face): Prefer defface attribute
':weight bold' to its obsolete alias ':bold t'.  See also Bug#73552.

(cherry picked from commit 375befcacc8e7c37ec490145aa6ff9737ad102a1)