MM-60115, MM-62436, MM-62493: Compliance export downloads from local and s3; e2e tests (#29806)

* add ZipReader method to filestore and file/s3 backends

to merge

to merge

* add WriteStreamResponse as an alternative to WriteFileResponse

* add generated layers

* enable download link; download job endpoint now streams export dir zips

* fix MM-62493

* re-enable e2e tests--we have download links, folks

* Add tests for ZipReader in filestore and s3store

* remove unnecessary error return on ZipReader

* little cleanup

* improve tests; some refactoring: s.Nil(err) -> s.NoError(err)

* blank commit

* backwards compatability for pre-10.5 job downloads

* compress file response; better errors; better comments; PR comments

* update generated app layers

* improve/widen tests; improve comments; simplify localstore ZipReader

* regenerate layers

* follow GoDoc conventions

* update generated layers

* remove unnecessary comment

* in jobs/job-id/download, clean exportDir before sending to ZipReader

* better comments; add an error return on ZipReader

* improve file permissions

* adjust tests for new error returns

* linting

* i18n

server/platform/shared/filestore/mocks/FileBackend.go

@@ -387,6 +387,36 @@ func (_m *FileBackend) WriteFile(fr io.Reader, path string) (int64, error) {
 	return r0, r1
 }
 
+// ZipReader provides a mock function with given fields: path, deflate
+func (_m *FileBackend) ZipReader(path string, deflate bool) (io.ReadCloser, error) {
+	ret := _m.Called(path, deflate)
+
+	if len(ret) == 0 {
+		panic("no return value specified for ZipReader")
+	}
+
+	var r0 io.ReadCloser
+	var r1 error
+	if rf, ok := ret.Get(0).(func(string, bool) (io.ReadCloser, error)); ok {
+		return rf(path, deflate)
+	}
+	if rf, ok := ret.Get(0).(func(string, bool) io.ReadCloser); ok {
+		r0 = rf(path, deflate)
+	} else {
+		if ret.Get(0) != nil {
+			r0 = ret.Get(0).(io.ReadCloser)
+		}
+	}
+
+	if rf, ok := ret.Get(1).(func(string, bool) error); ok {
+		r1 = rf(path, deflate)
+	} else {
+		r1 = ret.Error(1)
+	}
+
+	return r0, r1
+}
+
 // NewFileBackend creates a new instance of FileBackend. It also registers a testing interface on the mock and a cleanup function to assert the mocks expectations.
 // The first argument is typically a *testing.T value.
 func NewFileBackend(t interface {