EOL changes to python 3.9

[sireeshajonnalagadda]

Ref #1464

[Copilot]

Pull Request Overview

This PR removes support for Python 3.9 variants from the Python dev container image across bookworm and bullseye distributions. The changes reflect the deprecation of Python 3.9 from the supported versions list.

• Removes Python 3.9 variants (bookworm and bullseye) from manifest and documentation
• Updates README to remove references to Python 3.9 image tags
• Cleans up formatting inconsistencies in manifest.json

Reviewed Changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated 4 comments.

File	Description
src/python/manifest.json	Removes 3.9-bookworm and 3.9-bullseye variants from the variants list and architectures configuration; includes whitespace formatting changes
src/python/README.md	Removes Python 3.9 reference from available image variants list and pre-built version examples; includes merge conflict markers that need resolution

[Copilot]

The version should be bumped according to semantic versioning when removing Python 3.9 variants. Since this is removing support for existing variants (a breaking change), the version should be bumped from '2.1.2' to '3.0.0'.

[Copilot]

Trailing whitespace detected at the end of this line. This should be removed to maintain consistent formatting.

Suggested change

	],
	],

[Copilot]

Inconsistent indentation detected. This line uses spaces while the rest of the file uses tabs. Change the leading spaces to a tab to maintain consistency.

Suggested change

	],
	],

[Copilot]

Merge conflict markers detected in the README. The conflict between lines 12-14 must be resolved. Based on the PR intent to remove Python 3.9, line 12 should be kept (without 3.9 variants) and lines 13-14 should be removed. Additionally, line 12 is missing Python 3.14 variants and has a formatting issue with missing space after '3-bookworm,'.

Suggested change

	| *Available image variants* | 3 / 3-trixie, 3.10 / 3.10-trixie, 3.11-trixie / 3.11, 3.12-trixie / 3.12, 3.13-trixie / 3.13, 3-bookworm,3.10-bookworm, 3.11-bookworm, 3.12-bookworm, 3.13-bookworm, 3-bullseye, 3.10-bullseye, 3.11-bullseye, 3.12-bullseye, 3.13-bullseye ([full list](https://mcr.microsoft.com/v2/devcontainers/python/tags/list)) |
	=======
	| *Available image variants* | 3 / 3-trixie, 3.9 / 3.9-trixie, 3.10 / 3.10-trixie, 3.11-trixie / 3.11, 3.12-trixie / 3.12, 3.13-trixie / 3.13, 3.14, 3.14-trixie, 3-bookworm, 3.9-bookworm, 3.10-bookworm, 3.11-bookworm, 3.12-bookworm, 3.13-bookworm, 3.14-bookworm, 3-bullseye, 3.9-bullseye, 3.10-bullseye, 3.11-bullseye, 3.12-bullseye, 3.13-bullseye ([full list](https://mcr.microsoft.com/v2/devcontainers/python/tags/list)) |
	| *Available image variants* | 3 / 3-trixie, 3.10 / 3.10-trixie, 3.11 / 3.11-trixie, 3.12 / 3.12-trixie, 3.13 / 3.13-trixie, 3.14 / 3.14-trixie, 3-bookworm, 3.10-bookworm, 3.11-bookworm, 3.12-bookworm, 3.13-bookworm, 3.14-bookworm, 3-bullseye, 3.10-bullseye, 3.11-bullseye, 3.12-bullseye, 3.13-bullseye, 3.14-bullseye ([full list](https://mcr.microsoft.com/v2/devcontainers/python/tags/list)) |