40696: changefeedccl: fix violation of CDC's ordering guarantees r=aayushshah15 a=aayushshah15

In cloudStorageSink, we currently name output files based on the earliest
timestamps inside those files. This can sometimes muddle the ordering
of output files, leading to a violation of CDC's ordering properties

This change fixes this violation by instead using the times of the 
last `EmitRow` and `EmitResolvedTimestamp` calls to order files. This ensures
that timestamps within the output files are consumed in the same order
that they're emitted in.

Fixes: #38368

Release justification: Fixes limitation of changefeeds when using cloud storage sinks.

Release note: None

41414: storage: treat non-voter replicas as suspect for replica GC r=ajwerner a=ajwerner

It is not clear that this is actually a problem but it seems like a good thing
to do. We can imagine cases where a replica is removed but never receives the
message which removes it from the range. In this case we could wait up to
10 days before removing the range. The VOTER_INCOMING case seems like even
less of a problem but there's not an obvious reason to be conservative here.

Release note: None

41419: cmd/roachtest: remove some duplication in ORM tests r=yuzefovich a=yuzefovich

We're running several ORM test suites, and each test contains the
copy-pasted logic for parsing the test output and summarizing it.
Now that logic is extracted into a couple of functions which
removes the duplication.

Release note: None

41463: backup,import: remove sticky-bit conditional r=dt a=dt

Sticky-bit is always enabled in 20.1.

Release note: none.

41472: importccl: add nullif option to DELIMITED r=spaskob a=spaskob

This is indeed when an input has a field that needs to
be treated as NULL. Example:
```
import table t022 (
a int, b string
) DELIMITED DATA ('nodelocal:///foo.csv') with nullif = '';
```
This will force all empty string fields to be inserted as
NULL in the table.

Release note (sql): add nullif option to IMPORT ... DELIMITED.

41474: sql: use errors.Is instead of direct error compares r=pbardea a=knz

As suggested in the error handling RFC.

Release justification: Fix to earlier fix for release.

Release note: None

Co-authored-by: Aayush Shah <aayush.shah15@gmail.com>
Co-authored-by: Andrew Werner <ajwerner@cockroachlabs.com>
Co-authored-by: Yahor Yuzefovich <yahor@cockroachlabs.com>
Co-authored-by: David Taylor <tinystatemachine@gmail.com>
Co-authored-by: Spas Bojanov <spas@cockroachlabs.com>
Co-authored-by: Raphael 'kena' Poss <knz@thaumogen.net>