LaTeX: add \sphinxnotetitle et al.

In passing I reverted some deprecation I had added at 6bf40599e to some
internals of the sphinxadmonition environment, as it does not look that
pressing anyhow and the redundant namings of two colors in particular
may nevertheless prove useful to user \renewcommand's, as they avoid to
have to refer to \spx@noticetype.

doc/latex.rst

@@ -1464,6 +1464,16 @@ Macros
      ``\sphinxsamedocref``;     ``\emph{#1}``
      ``\sphinxparam``;          ``\emph{#1}``
      ``\sphinxoptional``; ``[#1]`` with larger brackets, see source
+     ``\sphinxnotetitle``;      ``\sphinxstrong{#1}<space>``
+     ``\sphinxhinttitle``;      *idem*
+     ``\sphinximportanttitle``; *idem*
+     ``\sphinxtiptitle``;       *idem*
+     ``\sphinxwarningtitle``;   *idem*
+     ``\sphinxcautiontitle``;   *idem*
+     ``\sphinxattentiontitle``; *idem*
+     ``\sphinxdangertitle``;    *idem*
+     ``\sphinxerrortitle``;     *idem*
+     ``\sphinxseealsotitle``;   ``\sphinxstrong{#1}\par\nopagebreak``
 
   .. versionadded:: 1.4.5
      Use of ``\sphinx`` prefixed macro names to limit possibilities of conflict
@@ -1478,6 +1488,17 @@ Macros
   .. versionadded:: 6.2.0
      ``\sphinxparam``, ``\sphinxsamedocref``
 
+  .. versionadded:: 6.2.0
+     ``\sphinxnotetitle`` et al.  The ``#1`` is the localized name of the
+     directive, with a final colon.  Wrap it as ``\sphinxremovefinalcolon{#1}``
+     if this final colon is to be removed.  Example:
+
+     .. code-block:: latex
+
+        \renewcommand\sphinxwarningtitle[1]{%
+          \underline{\textbf{\sphinxremovefinalcolon{#1}}}\par
+        }
+
 - More text styling:
 
   .. csv-table::