Merge branch '434300-support-japanese-ime-when-creating-new-issues-in-epic' into 'master'

Update CreateIssueForm to support Japanese IME

See merge request https://gitlab.com/gitlab-org/gitlab/-/merge_requests/147814



Merged-by: Florie Guibert <fguibert@gitlab.com>
Approved-by: Rajan Mistry <rmistry@gitlab.com>
Approved-by: Florie Guibert <fguibert@gitlab.com>
Reviewed-by: Rajan Mistry <rmistry@gitlab.com>
Co-authored-by: Rajan Mistry <rmistry@gitlab.com>
Co-authored-by: Jack Chapman <jachapman@gitlab.com>