Add support for --pip-version 24.1.1. (#2451)

The changelog is here:
  https://pip.pypa.io/en/stable/news/#v24-1-1

.github/workflows/ci.yml

@@ -73,8 +73,8 @@ jobs:
           - py311-pip20
           - py311-pip22_3_1
           - py311-pip23_1_2
-          - py312-pip24_1
-          - py313-pip24_1
+          - py312-pip24_1_1
+          - py313-pip24_1_1
           - pypy310-pip20
           - pypy310-pip22_3_1
           - pypy310-pip23_1_2
@@ -84,8 +84,8 @@ jobs:
           - py311-pip20-integration
           - py311-pip22_3_1-integration
           - py311-pip23_1_2-integration
-          - py312-pip24_1-integration
-          - py313-pip24_1-integration
+          - py312-pip24_1_1-integration
+          - py313-pip24_1_1-integration
           - pypy310-pip20-integration
           - pypy310-pip22_3_1-integration
           - pypy310-pip23_1_2-integration
@@ -129,10 +129,10 @@ jobs:
       matrix:
         include:
           - python-version: [ 3, 12 ]
-            tox-env: py312-pip24_1
+            tox-env: py312-pip24_1_1
             tox-env-python: python3.11
           - python-version: [ 3, 12 ]
-            tox-env: py312-pip24_1-integration
+            tox-env: py312-pip24_1_1-integration
             tox-env-python: python3.11
     steps:
       - name: Calculate Pythons to Expose

pex/pip/version.py

@@ -264,6 +264,13 @@ def values(cls):
         requires_python=">=3.8,<3.14",
     )
 
+    v24_1_1 = PipVersionValue(
+        version="24.1.1",
+        setuptools_version="70.1.1",
+        wheel_version="0.43.0",
+        requires_python=">=3.8,<3.14",
+    )
+
     VENDORED = v20_3_4_patched
     LATEST = LatestPipVersion()
     DEFAULT = DefaultPipVersion(preferred=(VENDORED, v23_2, v24_1))

tox.ini

@@ -86,6 +86,7 @@ setenv =
     pip23_3_2: _PEX_PIP_VERSION=23.3.2
     pip24_0: _PEX_PIP_VERSION=24.0
     pip24_1: _PEX_PIP_VERSION=24.1
+    pip24_1_1: _PEX_PIP_VERSION=24.1.1
 
     # Python 3 (until a fix here in 3.9: https://bugs.python.org/issue13601) switched from stderr
     # being unbuffered to stderr being buffered by default. This can lead to tests checking stderr