(CI) Adding workflow_dispatch where missing

.github/workflows/boost_version.yml

@@ -27,6 +27,7 @@ name: Boost supported versions
 # - 1.56 is the minimum version we ask (Aug 2014)
 
 on:
+  workflow_dispatch:
   push:
     paths:
       - '.github/workflows/boost_version.yml'

.github/workflows/check-queries.yml

@@ -12,6 +12,7 @@ name: Check queries
 # - the latest postgis version
 
 on:
+  workflow_dispatch:
   push:
     paths:
       - '.github/workflows/check-queries.yml'

.github/workflows/clang.yml

@@ -11,6 +11,7 @@ name: Build for Ubuntu with clang
 # - postgis 3
 
 on:
+  workflow_dispatch:
   push:
     paths:
       - '.github/workflows/clang.yml'

.github/workflows/tidy-check.yml

@@ -1,6 +1,7 @@
 name: clang-tidy check
 
 on:
+  workflow_dispatch:
   pull_request:
     branches-ignore:
       - 'gh-pages'