fix importlib and distutils formatting of platform tag for ARM

13: warn for hmac and hexlify r=ltratt a=nanjekyejoannah

This PR adds warnings for the following modules:
- `hmac`
- `binascii.hexlify`
- `binascii.b2a_hex`

See the notes below:

1. warn for the 'digest' parameter in hmac in pygrate2

In Python 2:

```
>>> import hashlib
>>> import hmac
>>> string1 = 'firststring'.encode('utf-8')
>>> string2 = 'secondstring'.encode('utf-8')
>>> digest = hmac.new(key=string1, msg=string2, digestmod=hashlib.sha256).digest()
>>> digest = hmac.new(key=string1, msg=string2).digest() 
>>> 
```

In Python 3:

```
string1 = 'firststring'.encode('utf-8')
>>> string2 = 'secondstring'.encode('utf-8')
>>> digest = hmac.new(key=string1, msg=string2, digestmod=hashlib.sha256).digest()
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
NameError: name 'hmac' is not defined
>>> import hashlib
>>> import hmac
>>> digest = hmac.new(key=string1, msg=string2, digestmod=hashlib.sha256).digest()
>>> digest = hmac.new(key=string1, msg=string2).digest() 
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "/usr/local/Cellar/python@3.9/3.9.12_1/Frameworks/Python.framework/Versions/3.9/lib/python3.9/hmac.py", line 170, in new
    return HMAC(key, msg, digestmod)
  File "/usr/local/Cellar/python@3.9/3.9.12_1/Frameworks/Python.framework/Versions/3.9/lib/python3.9/hmac.py", line 56, in __init__
    raise TypeError("Missing required parameter 'digestmod'.")
TypeError: Missing required parameter 'digestmod'.
>>> 
```


2. Warn for hexlify 

In python 2:

```
>>> import codecs
>>> hexlify = codecs.getencoder('hex')
>>> hexlify(b'Blaah')[0]
'426c616168'
>>> import binascii
>>> binascii.hexlify(b'Blaah')
'426c616168'
>>> binascii.hexlify('Blaah')
'426c616168'
>>> 
```

In Python 3:

```
>>> import codecs
>>> hexlify = codecs.getencoder('hex')
>>> hexlify(b'Blaah')[0]
b'426c616168'
>>> import binascii
>>> binascii.hexlify(b'Blaah')
b'426c616168'
>>> binascii.hexlify('Blaah')
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
TypeError: a bytes-like object is required, not 'str'
>>> 
```


Co-authored-by: Joannah Nanjekye <jnanjekye@python.org>

16: Warn for specific thread module methods r=ltratt a=nanjekyejoannah

Dont merge until python#13  and  python#14 are merged, some helper code cuts across.

This replaces python#15 

Threading module Notes

Python 2:

```
>>> from thread import get_ident
>>> from threading import get_ident
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
ImportError: cannot import name get_ident
>>> import threading
>>> from threading import _get_ident
>>>
```

Python 3:

```
>>> from threading import get_ident
>>> from thread import get_ident
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
ModuleNotFoundError: No module named 'thread'
>
```

**Note:**

There is no neutral way of porting

Co-authored-by: Joannah Nanjekye <jnanjekye@python.org>

Fix macos builds

…st round-trips

plistlib's _escape() function was normalizing \r\n to \n and \r to \n
during XML plist serialization. When the plist was loaded back, the
original carriage return characters were lost because expat also
normalizes newlines in XML character data.

Fix by encoding \r as the XML character reference &python#13; instead of
converting it to \n. Character references are not subject to XML
newline normalization, so expat correctly decodes &python#13; back to \r,
preserving the original data during round-trips.