Decomissioned PR-Custom-Review (#2503)

This PR decomissions
[`PR-Custom-Review`](https://github.com/paritytech/pr-custom-review) in
replacement for
[`Review-bot`](https://github.com/paritytech/review-bot).

.github/pr-custom-review.yml

-# 🔒 PROTECTED: Changes to locks-review-team should be approved by the current locks-review-team
-locks-review-team: locks-review
-team-leads-team: polkadot-review
-action-review-team: ci
-
-rules:
-  - name: CI files
-    check_type: changed_files
-    condition:
-      include: ^\.gitlab-ci\.yml|^docker/.*|^\.github/.*|^\.gitlab/.*|^\.config/nextest.toml|^\.cargo/.*
-      exclude: ^\.gitlab/pipeline/zombienet.*
-    min_approvals: 2
-    teams:
-      - ci
-      - release-engineering
-
-  - name: Core developers
-    check_type: changed_files
-    condition:
-      include: .*
-      # excluding files from 'Runtime files' and 'CI files' rules
-      exclude: ^polkadot/runtime/(kusama|polkadot)/src/[^/]+\.rs$|^cumulus/parachains/runtimes/assets/(asset-hub-kusama|asset-hub-polkadot)/src/[^/]+\.rs$|^cumulus/parachains/runtimes/bridge-hubs/(bridge-hub-kusama|bridge-hub-polkadot)/src/[^/]+\.rs$|^cumulus/parachains/runtimes/collectives/collectives-polkadot/src/[^/]+\.rs$|^cumulus/parachains/common/src/[^/]+\.rs$|^substrate/frame/(?!.*(nfts/.*|uniques/.*|babe/.*|grandpa/.*|beefy|merkle-mountain-range/.*|contracts/.*|election|nomination-pools/.*|staking/.*|aura/.*))|^polkadot/runtime/(kusama|polkadot)/src/[^/]+\.rs$|^\.gitlab-ci\.yml|^docker/.*|^\.github/.*|^\.gitlab/.*|^\.config/nextest.toml|^\.cargo/.*
-    min_approvals: 2
-    teams:
-      - core-devs
-
-  # cumulus
-  - name: Runtime files cumulus
-    check_type: changed_files
-    condition: ^cumulus/parachains/runtimes/assets/(asset-hub-kusama|asset-hub-polkadot)/src/[^/]+\.rs$|^cumulus/parachains/runtimes/bridge-hubs/(bridge-hub-kusama|bridge-hub-polkadot)/src/[^/]+\.rs$|^cumulus/parachains/runtimes/collectives/collectives-polkadot/src/[^/]+\.rs$|^cumulus/parachains/common/src/[^/]+\.rs$
-    all_distinct:
-      - min_approvals: 1
-        teams:
-          - locks-review
-      - min_approvals: 1
-        teams:
-          - polkadot-review
-
-  # if there are any changes in the bridges subtree (in case of backport changes back to bridges repo)
-  - name: Bridges subtree files
-    check_type: changed_files
-    condition: ^bridges/.*
-    min_approvals: 1
-    teams:
-      - bridges-core
-
-  # substrate
-
-  - name: FRAME coders substrate
-    check_type: changed_files
-    condition:
-      include: ^substrate/frame/(?!.*(nfts/.*|uniques/.*|babe/.*|grandpa/.*|beefy|merkle-mountain-range/.*|contracts/.*|election|nomination-pools/.*|staking/.*|aura/.*))
-    all:
-      - min_approvals: 2
-        teams:
-          - core-devs
-      - min_approvals: 1
-        teams:
-          - frame-coders
-
-prevent-review-request:
-  teams:
-    - core-devs

.github/workflows/pr-custom-review.yml

-name: Assign reviewers
-
-on:
-  pull_request:
-    branches:
-      - master
-      - main
-    types:
-      - opened
-      - reopened
-      - synchronize
-      - review_requested
-      - review_request_removed
-      - ready_for_review
-      - converted_to_draft
-  pull_request_review:
-  merge_group:
-
-jobs:
-  pr-custom-review:
-    runs-on: ubuntu-latest
-    steps:
-      - name: Skip merge queue
-        if: ${{ contains(github.ref, 'gh-readonly-queue') }}
-        run: exit 0
-      - name: Skip if pull request is in Draft
-        # `if: github.event.pull_request.draft == true` should be kept here, at
-        # the step level, rather than at the job level. The latter is not
-        # recommended because when the PR is moved from "Draft" to "Ready to
-        # review" the workflow will immediately be passing (since it was skipped),
-        # even though it hasn't actually ran, since it takes a few seconds for
-        # the workflow to start. This is also disclosed in:
-        # https://github.community/t/dont-run-actions-on-draft-pull-requests/16817/17
-        # That scenario would open an opportunity for the check to be bypassed:
-        # 1. Get your PR approved
-        # 2. Move it to Draft
-        # 3. Push whatever commits you want
-        # 4. Move it to "Ready for review"; now the workflow is passing (it was
-        #    skipped) and "Check reviews" is also passing (it won't be updated
-        #    until the workflow is finished)
-        if: github.event.pull_request.draft == true
-        run: exit 1
-      - name: pr-custom-review
-        uses: paritytech/pr-custom-review@master
-        with:
-          checks-reviews-api: http://pcr.parity-prod.parity.io/api/v1/check_reviews