Expand B404, B602, B603 and B604 to include anyio calls

[Skelmis]

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Currently the plugins B404, B602, B603 and B604 handle the general case of subproccesses within Python. These checks however do not cover anyio and I think it'd be useful to add support for this.

Describe the solution you'd like
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Expand upon the existing plugins so that they may handle anyio cases.

Describe alternatives you've considered
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Manually conducting source code review to find and locate these calls.

Additional context
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While not as common as direct subprocess calls, the anyio package still appears to be relatively popular by download counts at least. Not all users will use subprocesses per say, but I still think this feature may be useful for Bandit to contain. I am also possibly looking to PR this feature myself, however I figured opening an issue first for any discussions surrounding direction would be ideal.

Example checks
Example vulnerable code as currently seen by Bandit.
The following code examples are considered equivalent (source):

result_str = await anyio.run_process("user input here")
result_str = subprocess.run("user input here", shell=True)

With the following code Bandit outputs the following, only alerting on the subprocess call.
Code:

import asyncio

import anyio
import subprocess


async def main():
    command = input()

    # Anyio
    result_str = await anyio.run_process(command)

    # Subprocess
    result_str = subprocess.run(command, shell=True)


asyncio.run(main())

Bandit output:

>> Issue: [B602:subprocess_popen_with_shell_equals_true] subprocess call with shell=True identified, security issue.
   Severity: High   Confidence: High
   CWE: CWE-78 (https://cwe.mitre.org/data/definitions/78.html)
   More Info: https://bandit.readthedocs.io/en/1.7.10/plugins/b602_subprocess_popen_with_shell_equals_true.html
   Location: ./bandit.py:14:17
13	    # Subprocess
14	    result_str = subprocess.run(command, shell=True)
15