remove the *-skip workflows (fix haskell#10868)

this essentially reverts haskell#9355

Author: ulysses4ever

.github/workflows/bootstrap.skip.yml

@@ -5,31 +5,11 @@ concurrency:
   group: ${{ github.ref }}-${{ github.workflow }}
   cancel-in-progress: true
 
-# Note: This workflow file contains the required job "Bootstrap post job". We are using path filtering
-# here to ignore PRs which only change documentation. This can cause a problem, see the workflow file
-# "bootstrap.skip.yml" for a description of the problem and the solution provided in that file.
 on:
   push:
-    paths-ignore:
-      - 'doc/**'
-      - '**/README.md'
-      - 'CONTRIBUTING.md'
-      - "changelog.d/**"
-      # only top level for these, because various test packages have them too
-      - "*/ChangeLog.md"
-      - "*/changelog.md"
-      - "release-notes/**"
     branches:
       - master
   pull_request:
-    paths-ignore:
-      - 'doc/**'
-      - '**/README.md'
-      - 'CONTRIBUTING.md'
-      - "changelog.d/**"
-      - "*/ChangeLog.md"
-      - "*/changelog.md"
-      - "release-notes/**"
   release:
     types:
       - created

.github/workflows/bootstrap.yml

@@ -7,26 +7,9 @@ concurrency:
 
 on:
   push:
-    paths-ignore:
-      - "doc/**"
-      - "**/README.md"
-      - "CONTRIBUTING.md"
-      - "changelog.d/**"
-      # only top level for these, because various test packages have them too
-      - "*/ChangeLog.md"
-      - "*/changelog.md"
-      - "release-notes/**"
     branches:
       - master
   pull_request:
-    paths-ignore:
-      - "doc/**"
-      - "**/README.md"
-      - "CONTRIBUTING.md"
-      - "changelog.d/**"
-      - "*/ChangeLog.md"
-      - "*/changelog.md"
-      - "release-notes/**"
   release:
     types:
       - created

.github/workflows/check-sdist.skip.yml

@@ -5,33 +5,13 @@ concurrency:
   group: ${{ github.ref }}-${{ github.workflow }}
   cancel-in-progress: true
 
-# Note: This workflow file contains the required job "Validate post job". We are using path filtering
-# here to ignore PRs which only change documentation. This can cause a problem, see the workflow file
-# "validate.skip.yml" for a description of the problem and the solution provided in that file.
 on:
   push:
-    paths-ignore:
-      - "doc/**"
-      - "**/README.md"
-      - "CONTRIBUTING.md"
-      - "changelog.d/**"
-      # only top level for these, because various test packages have them too
-      - "*/ChangeLog.md"
-      - "*/changelog.md"
-      - "release-notes/**"
     branches:
       - master
       # hardcoded LTS branch, change when new LTS released!
       - '3.12'
   pull_request:
-    paths-ignore:
-      - "doc/**"
-      - "**/README.md"
-      - "CONTRIBUTING.md"
-      - "changelog.d/**"
-      - "*/ChangeLog.md"
-      - "*/changelog.md"
-      - "release-notes/**"
   release:
     types:
       - created