Update tox template

otc_metadata/templates/tox.ini.j2

@@ -23,6 +23,10 @@ commands = {posargs}
 
 [testenv:docs]
 deps = -r{toxinidir}/doc/requirements.txt
+allowlist_externals =
+  mkdir
+  cp
+  find
 commands =
 {%- for doc in docs %}
   {[testenv:{{ doc.type }}]commands}
@@ -32,7 +36,11 @@ commands =
 [testenv:docs-pdf]
 deps = -r{toxinidir}/doc/requirements.txt
 allowlist_externals =
+  rm
   mkdir
+  make
+  bash
+  cp
 commands =
   mkdir -p doc/build/pdf
 {%- for doc in docs %}
@@ -49,8 +57,10 @@ deps = -r{toxinidir}/doc/requirements.txt
 allowlist_externals =
   cp
   mkdir
+  find
 commands =
   sphinx-build -W --keep-going -b html {{ loc }}/source doc/build/html/{{ doc.type }}
+  find doc/build/html -type d -name '_sources' -exec rm -rf {:} ;
 {%- if doc.type == 'api-ref' %}
   mkdir -p api-ref/build/html
   cp -av doc/build/html/api-ref api-ref/build/html
@@ -72,7 +82,7 @@ allowlist_externals =
 commands =
   sphinx-build -W --keep-going -b json {{ loc }}/source doc/build/json/{{ doc.type }}
   # Drop data useless for the search
-  find doc/build/json -type d -and ( -name '_images' -or -name '_static' -or -name '_sources' ) -exec rm {:} ;
+  find doc/build/json -type d -and ( -name '_images' -or -name '_static' -or -name '_sources' ) -exec rm -rf {:} ;
 {%- if doc.type == 'api-ref' %}
   mkdir -p api-ref/build/json
   cp -av doc/build/json/api-ref api-ref/build/json