Drop pybins and allow to install them all

Requires chainguard-dev/melange#1166

Drop pybins, instead build all packages with commands in /usr/bin.
Set replaces, replaces-priority to ensure they are apk installable.
Also set provider-priority such that `apk add py3-pip` transparently
installs py3.12-pip alone.

This is all great, however not at all supported by apko. But imho
should be supported. As one simply has to sort packages in replaces
priority order prior to streaming. And allow overriding files between
packages that have replaces declared.

```console
...
(13/25) Installing python-3.10-base (3.10.14-r1)
(14/25) Installing py3.10-flit-core (3.9.0-r2)
(15/25) Installing py3.10-setuptools (69.5.1-r1)
(16/25) Installing py3.10-pip (24.0-r2)
(17/25) Installing python-3.11-base (3.11.9-r1)
(18/25) Installing py3.11-flit-core (3.9.0-r2)
(19/25) Installing py3.11-setuptools (69.5.1-r1)
(20/25) Installing py3.11-pip (24.0-r2)
(21/25) Installing python-3.12-base (3.12.3-r1)
(22/25) Installing py3.12-flit-core (3.9.0-r2)
(23/25) Installing py3.12-setuptools (69.5.1-r1)
(24/25) Installing py3.12-pip (24.0-r2)
(25/25) Installing py3-supported-pip (24.0-r2)
OK: 197 MiB in 40 packages

-rwxrwxr-x    1 root     root           946 Apr 26 22:22 /usr/bin/pip3.12
-rwxrwxr-x    1 root     root           946 Apr 26 22:22 /usr/bin/pip3.11
-rwxrwxr-x    1 root     root           946 Apr 26 22:22 /usr/bin/pip3.10
-rwxrwxr-x    1 root     root           940 Apr 26 22:22 /usr/bin/pip3
-rwxrwxr-x    1 root     root           938 Apr 26 22:22 /usr/bin/pip
```

pipelines/py/install-compile.yaml

@@ -16,10 +16,3 @@ pipeline:
   - name: "compileall ${{inputs.python}}"
     runs: |
       ${{inputs.python}} -m compileall --invalidation-mode=unchecked-hash -r100 ${{targets.subpkgdir}}/usr/lib/
-      pyver=$(${{inputs.python}} -c 'import sys; print("%s.%s" % (sys.version_info.major, sys.version_info.minor))')
-      for bin in ${{targets.subpkgdir}}/usr/bin/*; do
-          [ -f "$bin" ] && [ -x "$bin" ] || continue
-          d="${{targets.subpkgdir}}/usr/pybin/$pyver"
-          [ -d "$d" ] || mkdir -p "$d"
-          mv "$bin" "$d/"
-      done

pipelines/py/pip-build-install.yaml

@@ -33,14 +33,3 @@ pipeline:
           "--find-links=$distwheelsd" --no-index --no-build-isolation --no-deps \
           --force-reinstall --no-compile --prefix=/usr "--root=$root" "$wd"/*.whl
       vr $py -m compileall --invalidation-mode=unchecked-hash -r100 "$root/$sitepkgd"
-
-  - name: "compileall ${{inputs.python}}"
-    runs: |
-      pyver=$(${{inputs.python}} -c 'import sys; print("%s.%s" % (sys.version_info.major, sys.version_info.minor))')
-      for bin in ${{inputs.dest}}/usr/bin/*; do
-          [ -f "$bin" ] && [ -x "$bin" ] || continue
-          d="${{inputs.dest}}/usr/pybin/$pyver"
-          [ -d "$d" ] || mkdir -p "$d"
-          mv "$bin" "$d/"
-          echo "moved $bin -> $d/"
-      done

py3-pip.yaml

@@ -5,7 +5,11 @@ package:
   description: The PyPA recommended tool for installing Python packages.
   copyright:
     - license: MIT
+  checks:
+    disabled:
+      - empty
   dependencies:
+    provider-priority: 0
     runtime:
       - py3.12-${{vars.pypi-package}}
 
@@ -15,9 +19,9 @@ vars:
 data:
   - name: py-versions
     items:
-      3.10: ""
-      3.11: ""
-      3.12: ""
+      3.10: "310"
+      3.11: "311"
+      3.12: "312"
 
 environment:
   contents:
@@ -45,7 +49,21 @@ subpackages:
         with:
           python: python${{range.key}}
       - uses: strip
+    # ideally want If syntax here
+    # if: ${{range.key}} != 3.12
+    #   options:
+    #     no-commands: true
+    options:
+      no-commands: true
     dependencies:
+      provides:
+        - py3-pip
+      replaces:
+        - py3.10-${{vars.pypi-package}}
+        - py3.11-${{vars.pypi-package}}
+        - py3.12-${{vars.pypi-package}}
+      provider-priority: ${{range.value}}
+      replaces-priority: ${{range.value}}
       runtime:
         - py${{range.key}}-flit-core
         - py${{range.key}}-setuptools