[BUG] XML iterfind error

Description
XML state and module can not iterate across multiple values it only finds the first value only.

Setup
(Please provide relevant configs and/or SLS files (be sure to remove sensitive info. There is no general set-up of Salt.)

Please be as specific as possible and give set-up details.

• on-prem machine
• [AWS Zen ] VM (Virtualbox, KVM, etc. please specify)
• VM running on a cloud service, please be explicit and add details
• container (Kubernetes, Docker, containerd, etc. please specify)
• or a combination, please be explicit
• jails if it is FreeBSD

Steps to Reproduce the behavior
(Include debug logs if possible and relevant)
Have an xml file (example log4j file) that contains multiple attributes with the same value. When trying to modify all the values it does not work

log4j example (only showing the logger information

 <logger name="com.exmaple" additivity="false">
   <level value="DEBUG" />
   <appender-ref ref="LOG" />
 </logger>

 <logger name="org.example2" additivity="false">
   <level value="DEBUG" />
   <appender-ref ref="LOG" />
 </logger>

 <logger name="org.example" additivity="false">
   <level value="DEBUG" />
   <appender-ref ref="LOG" />
 </logger>

 <logger name="com.example2" additivity="false">
   <level value="DEBUG" />
   <appender-ref ref="LOG" />
 </logger>

 <logger name="org.apache.catalina" additivity="false">
   <level value="DEBUG" />
   <appender-ref ref="TOMCATLOG" />
 </logger>

As show about if i wanted to change all the logger levels to INFO i am having problems when doing in salt because it only returns the first log level (for com.exmaple) not all of them

salt -v 'example minion'  xml.get_attribute /etc/tomcat/log4j.xml "logger/level"
Executing job with jid 20211102210613240526
-------------------------------------------

example.minion:
    ----------
    value:
        INFO

when i change the xpath to include the @ salt throws an error

The minion function caused an exception: Traceback (most recent call last):
      File "/usr/lib64/python3.6/xml/etree/ElementPath.py", line 263, in iterfind
        selector = _cache[cache_key]
    KeyError: ('.//logger/level/@value', None)
    
    During handling of the above exception, another exception occurred:
    
    Traceback (most recent call last):
      File "/usr/lib/python3.6/site-packages/salt/minion.py", line 1905, in _thread_return
        function_name, function_args, executors, opts, data
      File "/usr/lib/python3.6/site-packages/salt/minion.py", line 1861, in _execute_job_function
        return_data = self.executors[fname](opts, data, func, args, kwargs)
      File "/usr/lib/python3.6/site-packages/salt/loader.py", line 1241, in __call__
        return self.loader.run(run_func, *args, **kwargs)
      File "/usr/lib/python3.6/site-packages/salt/loader.py", line 2274, in run
        return self._last_context.run(self._run_as, _func_or_method, *args, **kwargs)
      File "/usr/lib/python3.6/site-packages/contextvars/__init__.py", line 38, in run
        return callable(*args, **kwargs)
      File "/usr/lib/python3.6/site-packages/salt/loader.py", line 2289, in _run_as
        return _func_or_method(*args, **kwargs)
      File "/usr/lib/python3.6/site-packages/salt/executors/direct_call.py", line 12, in execute
        return func(*args, **kwargs)
      File "/usr/lib/python3.6/site-packages/salt/loader.py", line 1241, in __call__
        return self.loader.run(run_func, *args, **kwargs)
      File "/usr/lib/python3.6/site-packages/salt/loader.py", line 2274, in run
        return self._last_context.run(self._run_as, _func_or_method, *args, **kwargs)
      File "/usr/lib/python3.6/site-packages/contextvars/__init__.py", line 38, in run
        return callable(*args, **kwargs)
      File "/usr/lib/python3.6/site-packages/salt/loader.py", line 2289, in _run_as
        return _func_or_method(*args, **kwargs)
      File "/usr/lib/python3.6/site-packages/salt/modules/xml.py", line 78, in get_attribute
        element = root.find(element)
      File "/usr/lib64/python3.6/xml/etree/ElementTree.py", line 652, in find
        return self._root.find(path, namespaces)
      File "/usr/lib64/python3.6/xml/etree/ElementPath.py", line 298, in find
        return next(iterfind(elem, path, namespaces), None)
      File "/usr/lib64/python3.6/xml/etree/ElementPath.py", line 277, in iterfind
        selector.append(ops[token[0]](next, token))
    KeyError: '@'

As per https://www.w3schools.com/xml/xml_xpath.asp you can use the xpath with an @ to grab all. Additionally, when i use an xml linter like xmlstarlet i can actually iterate through all the values

xmlstarlet view of all attributes

log4j:configuration/logger
log4j:configuration/logger/@name
log4j:configuration/logger/@additivity
log4j:configuration/logger/level
log4j:configuration/logger/level/@value
log4j:configuration/logger/appender-ref
log4j:configuration/logger/appender-ref/@ref
log4j:configuration/logger
log4j:configuration/logger/@name
log4j:configuration/logger/@additivity
log4j:configuration/logger/level
log4j:configuration/logger/level/@value
log4j:configuration/logger/appender-ref
log4j:configuration/logger/appender-ref/@ref
log4j:configuration/logger
log4j:configuration/logger/@name
log4j:configuration/logger/@additivity
log4j:configuration/logger/level
log4j:configuration/logger/level/@value
log4j:configuration/logger/appender-ref
log4j:configuration/logger/appender-ref/@ref
log4j:configuration/logger
log4j:configuration/logger/@name
log4j:configuration/logger/@additivity
log4j:configuration/logger/level
log4j:configuration/logger/level/@value
log4j:configuration/logger/appender-ref
log4j:configuration/logger/appender-ref/@ref

Expected behavior
The expected behavior would be to modify multiple attributes at once not just the first iteration it finds. Its looks like python findall might be the solution instead of iterfind. right now i am not able to take advantage of the salt module and stuck using cmd.run and running xmlstarlet locally to modify xml's

Screenshots
If applicable, add screenshots to help explain your problem.

Versions Report

Salt Version:
          Salt: 3003.1
 
Dependency Versions:
          cffi: Not Installed
      cherrypy: Not Installed
      dateutil: Not Installed
     docker-py: Not Installed
         gitdb: 0.6.4
     gitpython: 1.0.1
        Jinja2: 2.11.1
       libgit2: Not Installed
      M2Crypto: 0.35.2
          Mako: Not Installed
       msgpack: 0.6.2
  msgpack-pure: Not Installed
  mysql-python: Not Installed
     pycparser: Not Installed
      pycrypto: Not Installed
  pycryptodome: Not Installed
        pygit2: Not Installed
        Python: 3.6.8 (default, Nov 16 2020, 16:55:22)
  python-gnupg: Not Installed
        PyYAML: 3.13
         PyZMQ: 17.0.0
         smmap: 0.9.0
       timelib: Not Installed
       Tornado: 4.5.3
           ZMQ: 4.1.4
 
System Versions:
          dist: centos 7 Core
        locale: UTF-8
       machine: x86_64
       release: 3.10.0-1160.45.1.el7.x86_64
        system: Linux
       version: CentOS Linux 7 Core

Additional context
Add any other context about the problem here.