Allow git pull/push on project redirects

Closes #35385

See merge request gitlab-org/gitlab-ce!15670

(cherry picked from commit 2a181d68)

37c99562 Allow git pull/push on project redirects
64811239 Allow group/username transfers:
4344bba4 Fixes wrong condition on git access
b6bac528 Wrap ProjectMoved behavior into a class
70676e3b Fixes permanent migration
3328950e Moves allowed_path_validation up to Namespace
54900c4a Addreses ME review comments
740ed1e0 Add several improvements
6a0d9261 Add fixes based on MR suggestions
8a1a257b Ensures validations are only executed if RedirectRoute#permanent column exists
448f1c54 Fixes broken specs and suggestions on MR
da789af6 Add fixes based on MR comments
2bd96f5f Bump GITLAB_SHELL_VERSION to 5.10.2
75981dc4 Ensure RedirectRoute column information is flushed