chore(utils): make cache utils callonce() compatible with py 3.11 (#4322)

## Description
#4302 added a `callonce()` decorator as a cache utility function. However, this imported `inspect.getargspec()` was removed as of Python 3.11. This was fixed by importing `inspect.getfullargspec()`, which is the recommended replacement for `getargspec()`. Note that `getargspec()` is still used in Python 2.

## Checklist
- [ ] Title must conform to [conventional commit](https://github.com/conventional-changelog/commitlint/tree/master/%40commitlint/config-conventional).
- [ ] Add additional sections for `feat` and `fix` pull requests.
- [ ] Ensure tests are passing for affected code.
- [ ] [Library documentation](https://github.com/DataDog/dd-trace-py/tree/1.x/docs) and/or [Datadog's documentation site](https://github.com/DataDog/documentation/) is updated. Link to doc PR in description.





## Motivation


## Design 


## Testing strategy




## Relevant issue(s)


## Testing strategy




## Reviewer Checklist
- [ ] Title is accurate.
- [ ] Description motivates each change.
- [ ] No unnecessary changes were introduced in this PR.
- [ ] PR cannot be broken up into smaller PRs.
- [ ] Avoid breaking [API](https://ddtrace.readthedocs.io/en/stable/versioning.html#interfaces) changes unless absolutely necessary.
- [ ] Tests provided or description of manual testing performed is included in the code or PR.
- [ ] Release note has been added for fixes and features, or else `changelog/no-changelog` label added.
- [ ] All relevant GitHub issues are correctly linked.
- [ ] Backports are identified and tagged with Mergifyio.
- [ ] Add to milestone.

Author: Yun-Kim

ddtrace/internal/compat.py

@@ -1,3 +1,4 @@
+from inspect import isgeneratorfunction
 import platform
 import random
 import re
@@ -84,6 +85,27 @@
 else:
     pattern_type = re._pattern_type  # type: ignore[misc,attr-defined]
 
+try:
+    from inspect import getargspec as getfullargspec
+
+    def is_not_void_function(f, argspec):
+        return argspec.args or argspec.varargs or argspec.keywords or argspec.defaults or isgeneratorfunction(f)
+
+
+except ImportError:
+    from inspect import getfullargspec  # type: ignore[misc]  # noqa: F401
+
+    def is_not_void_function(f, argspec):
+        return (
+            argspec.args
+            or argspec.varargs
+            or argspec.varkw
+            or argspec.defaults
+            or argspec.kwonlyargs
+            or argspec.kwonlydefaults
+            or isgeneratorfunction(f)
+        )
+
 
 def is_integer(obj):
     # type: (Any) -> bool

ddtrace/internal/utils/cache.py

@@ -1,12 +1,13 @@
-from inspect import getargspec
-from inspect import isgeneratorfunction
 from threading import RLock
 from typing import Any
 from typing import Callable
 from typing import Optional
 from typing import Type
 from typing import TypeVar
 
+from ddtrace.internal.compat import getfullargspec
+from ddtrace.internal.compat import is_not_void_function
+
 
 miss = object()
 
@@ -107,9 +108,8 @@ def cached_wrapper(f):
 def callonce(f):
     # type: (Callable[[], Any]) -> Callable[[], Any]
     """Decorator for executing a function only the first time."""
-
-    argspec = getargspec(f)
-    if argspec.args or argspec.varargs or argspec.keywords or argspec.defaults or isgeneratorfunction(f):
+    argspec = getfullargspec(f)
+    if is_not_void_function(f, argspec):
         raise ValueError("The callonce decorator can only be applied to functions with no arguments")
 
     def _():