ci: Remove release retagging support (#55199)

From now on, we will instead just make another patch version bump. That
has the advantage that tags will actually always only be applied to the
version bump and not some random change as well as us being able to
prohibit updates of tag refs for the Zed Zippy identity as well.

Release Notes:

- N/A

.github/workflows/bump_patch_version.yml

@@ -50,16 +50,6 @@ jobs:
             echo "version=$version"
             echo "tag_suffix=$tag_suffix"
         } >> "$GITHUB_OUTPUT"
-    - name: bump_patch_version::run_bump_patch_version::verify_prior_release_exists
-      run: |
-        status=$(curl -s -o /dev/null -w '%{http_code}' "https://cloud.zed.dev/releases/$CHANNEL/$VERSION/asset?asset=zed&os=macos&arch=aarch64")
-        if [[ "$status" != "200" ]]; then
-            echo "::error::version $VERSION has not been released on $CHANNEL yet (HTTP $status) — bump the patch version only after the current version is released"
-            exit 1
-        fi
-      env:
-        CHANNEL: ${{ steps.channel.outputs.channel }}
-        VERSION: ${{ steps.channel.outputs.version }}
     - name: steps::install_cargo_edit
       uses: taiki-e/install-action@02cc5f8ca9f2301050c0c099055816a41ee05507
       with:

.github/workflows/retag_release.yml

@@ -1,88 +0,0 @@
-# Generated from xtask::workflows::retag_release
-# Rebuild with `cargo xtask workflows`.
-name: retag_release
-on:
-  workflow_dispatch:
-    inputs:
-      branch:
-        description: Release branch to re-tag (e.g. v0.180.x)
-        required: true
-        type: string
-jobs:
-  run_retag_release:
-    if: (github.repository_owner == 'zed-industries' || github.repository_owner == 'zed-extensions')
-    runs-on: namespace-profile-16x32-ubuntu-2204
-    steps:
-    - id: generate-token
-      name: steps::authenticate_as_zippy
-      uses: actions/create-github-app-token@f8d387b68d61c58ab83c6c016672934102569859
-      with:
-        app-id: ${{ secrets.ZED_ZIPPY_APP_ID }}
-        private-key: ${{ secrets.ZED_ZIPPY_APP_PRIVATE_KEY }}
-    - name: steps::checkout_repo
-      uses: actions/checkout@93cb6efe18208431cddfb8368fd83d5badbf9bfd
-      with:
-        clean: false
-        ref: ${{ inputs.branch }}
-        token: ${{ steps.generate-token.outputs.token }}
-    - id: info
-      name: retag_release::run_retag_release::resolve_tag
-      run: |
-        if [[ ! "$BRANCH" =~ ^v[0-9]+\.[0-9]{1,3}\.x$ ]]; then
-            echo "::error::branch '$BRANCH' does not match the release branch pattern v[N].[N].x"
-            exit 1
-        fi
-
-        channel="$(cat crates/zed/RELEASE_CHANNEL)"
-
-        tag_suffix=""
-        case $channel in
-          stable)
-            ;;
-          preview)
-            tag_suffix="-pre"
-            ;;
-          *)
-            echo "::error::must be run on a stable or preview release branch"
-            exit 1
-            ;;
-        esac
-
-        version=$(script/get-crate-version zed)
-
-        {
-            echo "channel=$channel"
-            echo "version=$version"
-            echo "tag_suffix=$tag_suffix"
-            echo "head_sha=$(git rev-parse HEAD)"
-        } >> "$GITHUB_OUTPUT"
-      env:
-        BRANCH: ${{ inputs.branch }}
-    - name: retag_release::run_retag_release::verify_no_existing_release
-      run: |
-        status=$(curl -s -o /dev/null -w '%{http_code}' "https://cloud.zed.dev/releases/$CHANNEL/$VERSION/asset?asset=zed&os=macos&arch=aarch64")
-        if [[ "$status" == "200" ]]; then
-            echo "::error::version $VERSION is already released on $CHANNEL — cannot re-tag a released version"
-            exit 1
-        fi
-      env:
-        CHANNEL: ${{ steps.info.outputs.channel }}
-        VERSION: ${{ steps.info.outputs.version }}
-    - name: steps::update_tag
-      uses: actions/github-script@f28e40c7f34bde8b3046d885e986cb6290c5673b
-      with:
-        script: |
-          github.rest.git.updateRef({
-              owner: context.repo.owner,
-              repo: context.repo.repo,
-              ref: 'tags/v${{ steps.info.outputs.version }}${{ steps.info.outputs.tag_suffix }}',
-              sha: '${{ steps.info.outputs.head_sha }}',
-              force: true
-          })
-        github-token: ${{ steps.generate-token.outputs.token }}
-concurrency:
-  group: ${{ github.workflow }}-${{ inputs.branch }}
-  cancel-in-progress: true
-defaults:
-  run:
-    shell: bash -euxo pipefail {0}