Revert "Release preparation for version 2.23.4"

[mbg]

Reverts #20745

[Copilot]

Pull Request Overview

This PR reverts an erroneous release across multiple CodeQL language packs and shared libraries, rolling back version numbers and reorganizing change notes from released to unreleased format.

• Reverts version numbers to pre-release state with -dev suffix across all affected packages
• Converts released change notes from monolithic released files to individual unreleased change note files with frontmatter
• Updates lastReleaseVersion to reflect the actual last stable release for each package

Reviewed Changes

Copilot reviewed 181 out of 181 changed files in this pull request and generated no comments.

Show a summary per file

File	Description
swift/ql/src/qlpack.yml	Reverts version from 1.2.8 to 1.2.8-dev
swift/ql/src/codeql-pack.release.yml	Rolls back lastReleaseVersion from 1.2.8 to 1.2.7
swift/ql/lib/qlpack.yml	Reverts major version from 6.0.0 to 5.0.10-dev
swift/ql/lib/codeql-pack.release.yml	Rolls back lastReleaseVersion from 6.0.0 to 5.0.9
swift/ql/lib/change-notes/released/6.0.0.md	Removes released change note content
swift/ql/lib/change-notes/2025-10-31-swift-6.2-ast.md	Creates unreleased change note for Swift 6.2 AST features
swift/ql/lib/change-notes/2025-10-22-swift-6.2.md	Creates unreleased change note for Swift 6.2 support
swift/ql/lib/change-notes/2025-10-22-swift-6.2-class-changes.md	Creates unreleased change note for breaking changes
swift/ql/lib/CHANGELOG.md	Removes 6.0.0 changelog entries
shared/*/qlpack.yml	Reverts versions to previous patch with -dev suffix for all shared libraries
shared/*/codeql-pack.release.yml	Rolls back lastReleaseVersion for all shared libraries
shared//change-notes/released/.md	Removes released change notes across all shared libraries
rust/ql/src/qlpack.yml	Reverts version from 0.1.19 to 0.1.19-dev
rust/ql/src/change-notes/2025-10-21-database-quality-diagnostic.md	Converts to unreleased format with frontmatter
rust/ql/lib/qlpack.yml	Reverts version from 0.1.19 to 0.1.19-dev
rust/ql/lib/change-notes/*.md	Creates multiple unreleased change notes for various improvements
ruby/ql/*/qlpack.yml	Reverts Ruby package versions to -dev state
python/ql/src/qlpack.yml	Reverts version from 1.6.8 to 1.6.8-dev
python/ql/src/change-notes/2025-09-19-insecure-cookie.md	Converts to unreleased format with frontmatter
python/ql/lib/qlpack.yml	Reverts minor version from 4.1.0 to 4.0.18-dev
python/ql/lib/change-notes/2025-10-02-python-overlay-compilation-plus-extractor.md	Creates unreleased change note for incremental database support
javascript/ql/*/qlpack.yml	Reverts JavaScript package versions to -dev state
java/ql/src/qlpack.yml	Reverts minor version from 1.9.0 to 1.8.3-dev
java/ql/src/change-notes/*.md	Creates multiple unreleased change notes for new queries and improvements
go/ql/*/qlpack.yml	Reverts Go package versions to -dev state
csharp/ql/src/qlpack.yml	Reverts version from 1.4.3 to 1.4.3-dev
csharp/ql/src/change-notes/2025-10-17-location-in-web-config.md	Converts to unreleased format with frontmatter
csharp/ql/lib/qlpack.yml	Reverts minor version from 5.3.0 to 5.2.7-dev
csharp/ql/lib/change-notes/*.md	Creates multiple unreleased change notes for deprecations and improvements
cpp/ql/*/qlpack.yml	Reverts C++ package versions to -dev state
cpp/ql/lib/change-notes/2025-10-16-range-analysis-performance.md	Creates unreleased bug fix note with frontmatter
actions/ql/*/qlpack.yml	Reverts Actions package versions to -dev state
misc/suite-helpers/qlpack.yml	Reverts version to -dev state

Comments suppressed due to low confidence (2)

python/ql/lib/change-notes/2025-10-02-python-overlay-compilation-plus-extractor.md:4

• Inconsistent blank line after frontmatter. Most change note files start the content immediately after the closing --- (line 3), but this file has an extra blank line (line 4). For consistency, the content should start on line 4 without the extra blank line.
  csharp/ql/src/change-notes/2025-10-17-location-in-web-config.md:4
• Inconsistent capitalization: "the" should be capitalized to "The" at the start of the sentence to match the style used in other change notes.

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