add DeleteWorkspaces algorithm, use it in GUI

re #17729

(cherry picked from commit 9953f7cc)

clang format and release notes

re #17729

(cherry picked from commit b6ba0e5c)

Resolve cppcheck warning

re #17729

(cherry picked from commit 8827cbd4)

Resolve small syntax error
(cherry picked from commit 18916823)

Add release note for mass workspace fix