ref-manual/packages: move ptest section to the test-manual

[ YOCTO #15106 ]

It makes more sense to document ptests in the test-manual. Since ptests
are still related to packages, keep a link to ptests from packages.rst
to the test-manual.

Reported-by: Yoann Congal <yoann.congal@smile.fr>
(From yocto-docs rev: 8b6ada020d595d86c7bbe78a27b7a6301715b039)

Signed-off-by: Antonin Godard <antonin.godard@bootlin.com>
(cherry picked from commit b389c06b709e4791e1cce5e8a5b58f6b0cd03a14)
Signed-off-by: Antonin Godard <antonin.godard@bootlin.com>
Signed-off-by: Steve Sakoman <steve@sakoman.com>

documentation/ref-manual/classes.rst

@@ -2478,7 +2478,7 @@ runtime tests for recipes that build software that provides these tests.
 This class is intended to be inherited by individual recipes. However,
 the class' functionality is largely disabled unless "ptest" appears in
 :term:`DISTRO_FEATURES`. See the
-":ref:`dev-manual/packages:testing packages with ptest`"
+":ref:`test-manual/ptest:testing packages with ptest`"
 section in the Yocto Project Development Tasks Manual for more information
 on ptest.
 
@@ -2491,7 +2491,7 @@ Enables package tests (ptests) specifically for GNOME packages, which
 have tests intended to be executed with ``gnome-desktop-testing``.
 
 For information on setting up and running ptests, see the
-":ref:`dev-manual/packages:testing packages with ptest`"
+":ref:`test-manual/ptest:testing packages with ptest`"
 section in the Yocto Project Development Tasks Manual.
 
 .. _ref-classes-python3-dir:

documentation/ref-manual/features.rst

@@ -157,7 +157,7 @@ metadata:
 
 -  *ptest:* Enables building the package tests where supported by
    individual recipes. For more information on package tests, see the
-   ":ref:`dev-manual/packages:testing packages with ptest`" section
+   ":ref:`test-manual/ptest:testing packages with ptest`" section
    in the Yocto Project Development Tasks Manual.
 
 -  *smbfs:* Include SMB networks client support (for mounting

documentation/ref-manual/qa-checks.rst

@@ -789,7 +789,6 @@ Errors and Warnings
     use a relative path rather than an absolute one, or to pick up the path from
     runtime configuration or environment variables.
 
-
 Configuring and Disabling QA Checks
 ===================================
 

documentation/ref-manual/release-process.rst

@@ -175,7 +175,7 @@ consists of the following pieces:
    operation and functions. However, the test can also use the IP
    address of a machine to test.
 
--  :ref:`ptest <dev-manual/packages:testing packages with ptest>`:
+-  :ref:`ptest <test-manual/ptest:testing packages with ptest>`:
    Runs tests against packages produced during the build for a given
    piece of software. The test allows the packages to be run within a
    target image.

documentation/ref-manual/variables.rst

@@ -6434,7 +6434,7 @@ system and gives an overview of their function and contents.
 
    :term:`PTEST_ENABLED`
       Specifies whether or not :ref:`Package
-      Test <dev-manual/packages:testing packages with ptest>` (ptest)
+      Test <test-manual/ptest:testing packages with ptest>` (ptest)
       functionality is enabled when building a recipe. You should not set
       this variable directly. Enabling and disabling building Package Tests
       at build time should be done by adding "ptest" to (or removing it