Point to the common errors page for transaction retry errrors

[dikshant]

Currently if someone encounters a transaction retry error they are linked to:
https://www.cockroachlabs.com/docs/stable/transaction-retry-error-reference

We should also consider linking to:
https://www.cockroachlabs.com/docs/stable/common-errors

For ReadWithinUncertaintyIntervalError errors we should also point to results_buffer_size cluster/session setting in the error message.

Jira issue: CRDB-38632