KMS: Documentation link on `googleapis.dev` is missing.

[di]

In #8705 the "Client Library Documentation" link in the google-cloud-kms README was changed from https://googleapis.github.io/google-cloud-python/latest/kms/index.html to https://googleapis.dev/python/kms/latest, but the latter does not exist.

Ref: https://issuetracker.google.com/issues/139095461

[tseaver]

The following are invalid "client library documentation" URLs linked into READMES:

• asset: https://googleapis.dev/python/asset/latest
• kms: https://googleapis.dev/python/kms/latest
• monitoring: https://google-cloud-python.readthedocs.io/en/latest/monitoring/
• scheduler: https://googleapis.dev/python/scheduler/latest
• tasks: https://googleapis.dev/python/tasks/latest
• trace: https://googleapis.dev/python/trace/latest

The one for monitoring hasn't been converted, now fixed in #8994.

@busunkim96 Can you help figure out why the others are broken?