add run_constrained for requests

[ngam]

See:
conda-forge/requests-feedstock#53
conda-forge/requests-feedstock#54
conda-forge/requests-feedstock#55
conda-forge/requests-feedstock#56

Copying:
@ocefpaf
@teake
@corneliusroemer

First: revert conda-forge/admin-requests#452; here's a PR: conda-forge/admin-requests#454

Checklist

• Used a personal fork of the feedstock to propose changes
• Bumped the build number (if the version is unchanged)
• Reset the build number to 0 (if the version changed)
• Re-rendered with the latest conda-smithy (Use the phrase @conda-forge-admin, please rerender in a comment in this PR for automated rerendering)
• Ensured the license file is being packaged.

[conda-forge-linter]

Hi! This is the friendly automated conda-forge-linting service.

I just wanted to let you know that I linted all conda-recipes in your PR (recipe) and found it was in an excellent condition.

[ngam]

Unfortunately, this didn't catch the broken build... maybe it wasn't moved back in time.

noarch::requests-2.26.0-pyhd8ed1ab_0.tar.bz2
-  "version": "2.26.0"
+  "version": "2.26.0",
+  "constrains": [
+    "chardet >=3.0.2,<5"
+  ]
noarch::requests-2.26.0-pyhd8ed1ab_1.tar.bz2
-  "version": "2.26.0"
+  "version": "2.26.0",
+  "constrains": [
+    "chardet >=3.0.2,<5"
+  ]
noarch::requests-2.27.0-pyhd8ed1ab_0.tar.bz2
-  "version": "2.27.0"
+  "version": "2.27.0",
+  "constrains": [
+    "chardet >=3.0.2,<5"
+  ]
noarch::requests-2.27.1-pyhd8ed1ab_0.tar.bz2
-  "version": "2.27.1"
+  "version": "2.27.1",
+  "constrains": [
+    "chardet >=3.0.2,<5"
+  ]

[ngam]

False alarm, we're all good:

Encountered problems while solving:
  - package requests-2.28.0-pyhd8ed1ab_0 has constraint chardet >=3.0.2,<5 conflicting with chardet-5.0.0-py310hbe9552e_0