manuals: split dev-manual/common-tasks.rst

A 500 KB source file is always harder to manage,
and can have section title conflicts.

So, the "Common Tasks" document is gone and all
its constituents are moved up one level.
You now have 40 chapters in the Development Tasks Manual.

(From yocto-docs rev: 8a45bc469411410020b8e688c137395fcaf3761b)

Signed-off-by: Michael Opdenacker <michael.opdenacker@bootlin.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

documentation/test-manual/intro.rst

@@ -142,7 +142,7 @@ the following types of tests:
 -  *Package Testing:* A Package Test (ptest) runs tests against packages
    built by the OpenEmbedded build system on the target machine. See the
    :ref:`Testing Packages With
-   ptest <dev-manual/common-tasks:Testing Packages With ptest>` section
+   ptest <dev-manual/packages:Testing Packages With ptest>` section
    in the Yocto Project Development Tasks Manual and the
    ":yocto_wiki:`Ptest </Ptest>`" Wiki page for more
    information on Ptest.

documentation/test-manual/yocto-project-compatible.rst

@@ -27,7 +27,7 @@ In the second version of the program, a script was added to make validation
 easier and clearer, the script is called  ``yocto-check-layer`` and is
 available in :term:`OpenEmbedded-Core (OE-Core)`.
 
-See :ref:`dev-manual/common-tasks:making sure your layer is compatible with yocto project`
+See :ref:`dev-manual/layers:making sure your layer is compatible with yocto project`
 for details.
 
 ========