Add few Python entries for NixOS (#44277)

rosdep/python.yaml

@@ -4909,6 +4909,7 @@ python3-ansible-runner-pip:
       packages: [ansible-runner]
 python3-antlr4:
   debian: [python3-antlr4]
+  nixos: [python3Packages.antlr4-python3-runtime]
   ubuntu:
     '*': [python3-antlr4]
     focal: null
@@ -5810,6 +5811,7 @@ python3-events-pip:
       packages: [Events]
 python3-expiringdict:
   debian: [python3-expiringdict]
+  nixos: [python3Packages.expiringdict]
   ubuntu: [python3-expiringdict]
 python3-ezdxf:
   debian:
@@ -5988,6 +5990,7 @@ python3-flake8-blind-except:
       pip:
         packages: [flake8-blind-except]
   fedora: [python3-flake8-blind-except]
+  nixos: [python3Packages.flake8-blind-except]
   opensuse: [python3-flake8-blind-except]
   rhel:
     '*': [python3-flake8-blind-except]
@@ -6033,6 +6036,7 @@ python3-flake8-class-newline:
       pip:
         packages: [flake8-class-newline]
   fedora: [python3-flake8-class-newline]
+  nixos: [python3Packages.flake8-class-newline]
   opensuse: [python3-flake8-class-newline]
   rhel:
     '*': [python3-flake8-class-newline]
@@ -6077,6 +6081,7 @@ python3-flake8-deprecated:
       pip:
         packages: [flake8-deprecated]
   fedora: [python3-flake8-deprecated]
+  nixos: [python3Packages.flake8-deprecated]
   opensuse: [python3-flake8-deprecated]
   rhel:
     '*': [python3-flake8-deprecated]
@@ -7939,6 +7944,7 @@ python3-petact-pip:
 python3-pexpect:
   debian: [python3-pexpect]
   fedora: [python3-pexpect]
+  nixos: [python3Packages.pexpect]
   opensuse: [python3-pexpect]
   rhel: ['python%{python3_pkgversion}-pexpect']
   ubuntu: [python3-pexpect]
@@ -8095,6 +8101,7 @@ python3-pre-commit:
       pip:
         packages: [pre-commit]
   fedora: [pre-commit]
+  nixos: [pre-commit]
   ubuntu:
     '*': [pre-commit]
     bionic:
@@ -9258,6 +9265,7 @@ python3-rich:
   debian: [python3-rich]
   fedora: [python3-rich]
   gentoo: [rich]
+  nixos: [python3Packages.rich]
   osx:
     pip:
       packages: [rich]