Removed 2020-resolver deprecated feature from pip

Makefile

@@ -39,6 +39,7 @@ all: ceph-config ceph-sudoer
 	patch -Np1 -d ceph-15.2.15 < ceph-15.2.15-fix_librbd_duplicate.patch
 	patch -Np1 -d ceph-15.2.15 < ceph-15.2.15-fix_ErasureCodeShec.patch
 	patch -Np1 -d ceph-15.2.15 < ceph-15.2.15-fix_mypy.patch
+	patch -Np1 -d ceph-15.2.15 < ceph-15.2.15-no_use_feature.patch
 	if [ `uname -m` = 'armv7l' ] ; then \
 	    patch -Np1 -d ceph-15.2.15 < ceph-15.2.15-arm32_fix.patch ; \
 	    patch -Np1 -d ceph-15.2.15 < ceph-15.2.15-arm32_fix_tests.patch ; \

ceph-15.2.15-no_use_feature.patch

+diff -uNr ceph-15.2.15/src/tools/setup-virtualenv.sh ceph-15.2.15-no_use_feature/src/tools/setup-virtualenv.sh
+--- ceph-15.2.15/src/tools/setup-virtualenv.sh	2021-10-21 00:49:57.000000000 +1030
++++ ceph-15.2.15-no_use_feature/src/tools/setup-virtualenv.sh	2022-10-22 14:37:25.298526207 +1030
+@@ -66,16 +66,9 @@
+     DISABLE_PIP_VERSION_CHECK=
+ fi
+ 
+-if pip --help | grep -q use-feature; then
+-    USE_FEATURE=--use-feature=2020-resolver
+-else
+-    USE_FEATURE=
+-fi
+-
+ # older versions of pip will not install wrap_console scripts
+ # when using wheel packages
+ pip $DISABLE_PIP_VERSION_CHECK --log $DIR/log.txt install \
+-    $USE_FEATURE \
+     --upgrade 'pip >= 6.1'
+ 
+ if pip --help | grep -q disable-pip-version-check; then
+@@ -89,7 +82,6 @@
+ fi
+ 
+ pip $DISABLE_PIP_VERSION_CHECK --log $DIR/log.txt install \
+-    $USE_FEATURE \
+     $NO_INDEX \
+     --find-links=file://$(pwd)/wheelhouse 'tox >=2.9.1'
+ 
+@@ -103,7 +95,6 @@
+         NO_INDEX=''
+     fi
+     pip --exists-action i $DISABLE_PIP_VERSION_CHECK --log $DIR/log.txt install \
+-        $USE_FEATURE \
+         $NO_INDEX \
+         --find-links=file://$(pwd)/wheelhouse $require $constraint
+ fi