Update python (#20092)

Changes:

- https://github.com/docker-library/python/commit/0c5c1f88: Merge pull request https://github.com/docker-library/python/pull/1091 from jnoordsij/add-3.15-rc
- https://github.com/docker-library/python/commit/30345657: Add 3.15-rc variants

Co-authored-by: Docker Library Bot <[email protected]>

library/python

@@ -5,6 +5,53 @@ Maintainers: Tianon Gravi <[email protected]> (@tianon),
 GitRepo: https://github.com/docker-library/python.git
 Builder: buildkit
 
+Tags: 3.15.0a1-trixie, 3.15-rc-trixie
+SharedTags: 3.15.0a1, 3.15-rc
+Architectures: amd64, arm32v5, arm32v7, arm64v8, i386, ppc64le, riscv64, s390x
+GitCommit: 303456576fd52b3e000639d5cfdf384442e730d7
+Directory: 3.15-rc/trixie
+
+Tags: 3.15.0a1-slim-trixie, 3.15-rc-slim-trixie, 3.15.0a1-slim, 3.15-rc-slim
+Architectures: amd64, arm32v5, arm32v7, arm64v8, i386, ppc64le, riscv64, s390x
+GitCommit: 303456576fd52b3e000639d5cfdf384442e730d7
+Directory: 3.15-rc/slim-trixie
+
+Tags: 3.15.0a1-bookworm, 3.15-rc-bookworm
+Architectures: amd64, arm32v5, arm32v7, arm64v8, i386, ppc64le, s390x
+GitCommit: 303456576fd52b3e000639d5cfdf384442e730d7
+Directory: 3.15-rc/bookworm
+
+Tags: 3.15.0a1-slim-bookworm, 3.15-rc-slim-bookworm
+Architectures: amd64, arm32v5, arm32v7, arm64v8, i386, ppc64le, s390x
+GitCommit: 303456576fd52b3e000639d5cfdf384442e730d7
+Directory: 3.15-rc/slim-bookworm
+
+Tags: 3.15.0a1-alpine3.22, 3.15-rc-alpine3.22, 3.15.0a1-alpine, 3.15-rc-alpine
+Architectures: amd64, arm32v6, arm32v7, arm64v8, i386, ppc64le, riscv64, s390x
+GitCommit: 303456576fd52b3e000639d5cfdf384442e730d7
+Directory: 3.15-rc/alpine3.22
+
+Tags: 3.15.0a1-alpine3.21, 3.15-rc-alpine3.21
+Architectures: amd64, arm32v6, arm32v7, arm64v8, i386, ppc64le, riscv64, s390x
+GitCommit: 303456576fd52b3e000639d5cfdf384442e730d7
+Directory: 3.15-rc/alpine3.21
+
+Tags: 3.15.0a1-windowsservercore-ltsc2025, 3.15-rc-windowsservercore-ltsc2025
+SharedTags: 3.15.0a1-windowsservercore, 3.15-rc-windowsservercore, 3.15.0a1, 3.15-rc
+Architectures: windows-amd64
+GitCommit: 303456576fd52b3e000639d5cfdf384442e730d7
+Directory: 3.15-rc/windows/windowsservercore-ltsc2025
+Constraints: windowsservercore-ltsc2025
+Builder: classic
+
+Tags: 3.15.0a1-windowsservercore-ltsc2022, 3.15-rc-windowsservercore-ltsc2022
+SharedTags: 3.15.0a1-windowsservercore, 3.15-rc-windowsservercore, 3.15.0a1, 3.15-rc
+Architectures: windows-amd64
+GitCommit: 303456576fd52b3e000639d5cfdf384442e730d7
+Directory: 3.15-rc/windows/windowsservercore-ltsc2022
+Constraints: windowsservercore-ltsc2022
+Builder: classic
+
 Tags: 3.14.0-trixie, 3.14-trixie, 3-trixie, trixie
 SharedTags: 3.14.0, 3.14, 3, latest
 Architectures: amd64, arm32v5, arm32v7, arm64v8, i386, ppc64le, riscv64, s390x