Upstream fix detection: missing follow-ups for release-20.0-github

[hubot]

Missing Upstream Follow-Ups

The following upstream vitess PRs have follow-up fixes that have NOT been backported to this branch.

vitess-gh PR #189 — Allow the use of db credentials when verifying unmanaged tablets conf… (backported upstream vitessio#17984)

• Follow-up: Allow empty passwords for unmanaged tablet configuration vitessio/vitess#18448 "Allow empty passwords for unmanaged tablet configuration" (merged) — Allow empty passwords for unmanaged tablet configuration vitessio/vitess#18448

vitess-gh PR #175 — sqlparser: Remove unneeded escaping (vitessio#16255) (backported upstream vitessio#16255)

• Follow-up: Fix codegen vitessio/vitess#16257 "Fix codegen" (merged) — Fix codegen vitessio/vitess#16257

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Generated by the ScheduleVitessUpstreamFixDetection workflow.

[andyedison]

marking off vitessio#18448 as it is an edge case that is for completeness but doesn't impact us

[andyedison]

manually removed an item to test workflow's ability to add new items it finds