bump default version of pip to support Python 3.13 (pantsbuild#21400)

The first version of pip to support Python 3.13 was 24.1, but I don't
think there is any merit to holding back when 24.2 is already out.
(Pants itself uses `latest`.) The first version of Pex to support 24.2
is v2.13.0.

(Pip 24.1 and 24.2 also both contain meaningful performance improvements
to dependency resolution --> pantsbuild#21223)

Release notes for where pex added support:
https://github.com/pex-tool/pex/releases/tag/v2.13.0

ref pantsbuild#20852

docs/notes/2.24.x.md

@@ -35,6 +35,8 @@ Deprecations:
 
 As a consequence of the lockfile generation, newer versions of many tools are now included in the default lockfiles.
 
+The default version of pip is now [24.2](https://pip.pypa.io/en/stable/news/#v24-2) bringing performance improvements to dependency resolution and support or the upcoming Python 3.13 release.
+
 The versions of `setuptools` and `wheel` used in Pants have been upgraded to `74.1.2` and `0.44.0` to address a remote code execution vulnerability in versions before setuptools `70.0`. This forces the minimum Python version to 3.8, in line with the changes mentioned above.
 
 #### S3

src/python/pants/backend/python/subsystems/setup.py

@@ -253,7 +253,7 @@ def interpreter_constraints(self) -> tuple[str, ...]:
         ),
     )
     pip_version = StrOption(
-        default="24.0",
+        default="24.2",
         help=softwrap(
             f"""
             Use this version of Pip for resolving requirements and generating lockfiles.

src/python/pants/backend/python/util_rules/pex_cli.py

@@ -42,7 +42,7 @@ class PexCli(TemplatedExternalTool):
 
     default_version = "v2.16.2"
     default_url_template = "https://github.com/pex-tool/pex/releases/download/{version}/pex"
-    version_constraints = ">=2.3.0,<3.0"
+    version_constraints = ">=2.13.0,<3.0"
 
     # extra args to be passed to the pex tool; note that they
     # are going to apply to all invocations of the pex tool.