feat(parallelstore): add file_stripe_level and directory_stripe_level…

… fields to Instance (#10622)

- [ ] Regenerate this pull request now.

PiperOrigin-RevId: 658160286

Source-Link: https://github.com/googleapis/googleapis/commit/24c5ee09178ac7d1387dfa2d6053be2fb93c8dc4

Source-Link: https://github.com/googleapis/googleapis-gen/commit/6e269227894fca3210a482385d12cfc1c4d1532f
Copy-Tag: eyJwIjoiLmdpdGh1Yi8uT3dsQm90LnlhbWwiLCJoIjoiNmUyNjkyMjc4OTRmY2EzMjEwYTQ4MjM4NWQxMmNmYzFjNGQxNTMyZiJ9