Merge branch 'azamat/chrysalis/rm-python4nbfb' (PR #7062)

Fix python module conflicts on Chrysalis.
Also, avoid possible python-cime_env-conda conflicts on Anvil, Aurora.

Fixes #7047

[BFB]

Author: amametjanov

cime_config/machines/config_machines.xml

@@ -2393,17 +2393,15 @@
         <arg name="placement">-m plane={{ tasks_per_node }}</arg>
       </arguments>
     </mpirun>
-    <module_system type="module">
+    <module_system type="module" allow_error="true">
       <init_path lang="sh">/home/software/spack-0.10.1/opt/spack/linux-centos7-x86_64/gcc-4.8.5/lmod-7.4.9-ic63herzfgw5u3na5mdtvp3nwxy6oj2z/lmod/lmod/init/sh;export MODULEPATH=$MODULEPATH:/software/centos7/spack-latest/share/spack/lmod/linux-centos7-x86_64/Core</init_path>
       <init_path lang="csh">/home/software/spack-0.10.1/opt/spack/linux-centos7-x86_64/gcc-4.8.5/lmod-7.4.9-ic63herzfgw5u3na5mdtvp3nwxy6oj2z/lmod/lmod/init/csh;setenv MODULEPATH $MODULEPATH\:/software/centos7/spack-latest/share/spack/lmod/linux-centos7-x86_64/Core</init_path>
       <init_path lang="python">/home/software/spack-0.10.1/opt/spack/linux-centos7-x86_64/gcc-4.8.5/lmod-7.4.9-ic63herzfgw5u3na5mdtvp3nwxy6oj2z/lmod/lmod/init/env_modules_python.py</init_path>
       <cmd_path lang="python">export MODULEPATH=$MODULEPATH:/software/centos7/spack-latest/share/spack/lmod/linux-centos7-x86_64/Core;/home/software/spack-0.10.1/opt/spack/linux-centos7-x86_64/gcc-4.8.5/lmod-7.4.9-ic63herzfgw5u3na5mdtvp3nwxy6oj2z/lmod/lmod/libexec/lmod python</cmd_path>
       <cmd_path lang="sh">module</cmd_path>
       <cmd_path lang="csh">module</cmd_path>
       <modules>
-        <command name="purge"/>
         <command name="use">/lcrc/group/e3sm/soft/modulefiles/anvil</command>
-        <command name="load">python/3.9.16-gm6ql7v</command>
         <command name="load">cmake/3.26.3-nszudya</command>
       </modules>
       <modules compiler="intel">
@@ -2528,16 +2526,14 @@
         <arg name="placement">-m plane={{ tasks_per_node }}</arg>
       </arguments>
     </mpirun>
-    <module_system type="module">
+    <module_system type="module" allow_error="true">
       <init_path lang="sh">/gpfs/fs1/soft/chrysalis/spack/opt/spack/linux-centos8-x86_64/gcc-9.3.0/lmod-8.3-5be73rg/lmod/lmod/init/sh</init_path>
       <init_path lang="csh">/gpfs/fs1/soft/chrysalis/spack/opt/spack/linux-centos8-x86_64/gcc-9.3.0/lmod-8.3-5be73rg/lmod/lmod/init/csh</init_path>
       <init_path lang="python">/gpfs/fs1/soft/chrysalis/spack/opt/spack/linux-centos8-x86_64/gcc-9.3.0/lmod-8.3-5be73rg/lmod/lmod/init/env_modules_python.py</init_path>
       <cmd_path lang="python">/gpfs/fs1/soft/chrysalis/spack/opt/spack/linux-centos8-x86_64/gcc-9.3.0/lmod-8.3-5be73rg/lmod/lmod/libexec/lmod python</cmd_path>
       <cmd_path lang="sh">module</cmd_path>
       <cmd_path lang="csh">module</cmd_path>
       <modules>
-        <command name="purge"/>
-        <command name="load">python/3.11.7-iexc6vq</command>
         <command name="load">subversion/1.14.0-e4smcy3</command>
         <command name="load">perl/5.32.0-bsnc6lt</command>
         <command name="load">cmake/3.24.2-whgdv7y</command>
@@ -3458,7 +3454,6 @@
        <cmd_path lang="csh">module</cmd_path>
        <cmd_path lang="python">/usr/share/lmod/lmod/libexec/lmod python</cmd_path>
        <modules>
-          <command name="load">python</command>
           <command name="load">cmake</command>
         </modules>
         <modules compiler="!gnu">