build: explicitly build binary for TeamCity nightly tests

The TeamCity nightly tests depend on the "publish bleeding edge" build,
which pulls in a ton of additional builds (e.g. for multiple OSes) that
we don't really need to run the nightlies. This can cause unrelated
build failures to fail the nightly tests.

This patch explicitly builds a CRDB binary in
`teamcity-nightly-roachtest.sh` such that the build can be decoupled
from "publish bleeding edge". This is a temporary mitigation until the
TeamCity builds and dependencies are cleaned up.

Touches https://cockroachlabs.atlassian.net/browse/DEVINF-16.
Touches #64263.

Release note: None

build/teamcity-nightly-roachtest.sh

@@ -8,11 +8,6 @@ source "$(dirname "${0}")/teamcity-support.sh"
 # apologies, you're going to have to dig around for them below or even better
 # yet, look at the job).
 
-# Note that when this script is called, the cockroach binary to be tested
-# already exists in the current directory.
-COCKROACH_BINARY="${PWD}/cockroach.linux-2.6.32-gnu-amd64"
-chmod +x "${COCKROACH_BINARY}"
-
 if [[ ! -f ~/.ssh/id_rsa.pub ]]; then
   ssh-keygen -q -C "roachtest-nightly $(date)" -N "" -f ~/.ssh/id_rsa
 fi
@@ -25,7 +20,8 @@ chmod o+rwx "${artifacts}"
 # Disable global -json flag.
 export PATH=$PATH:$(GOFLAGS=; go env GOPATH)/bin
 
-build/builder/mkrelease.sh amd64-linux-gnu bin/workload bin/roachtest bin/roachprod > "${artifacts}/build.txt" 2>&1 || cat "${artifacts}/build.txt"
+build/builder/mkrelease.sh amd64-linux-gnu build bin/workload bin/roachtest bin/roachprod \
+  > "${artifacts}/build.txt" 2>&1 || (cat "${artifacts}/build.txt"; false)
 
 # Set up Google credentials. Note that we need this for all clouds since we upload
 # perf artifacts to Google Storage at the end.
@@ -117,7 +113,7 @@ timeout -s INT $((1200*60)) "build/teamcity-roachtest-invoke.sh" \
   --cpu-quota="${CPUQUOTA}" \
   --cluster-id="${TC_BUILD_ID}" \
   --build-tag="${BUILD_TAG}" \
-  --cockroach="${COCKROACH_BINARY}" \
+  --cockroach="${PWD}/cockroach-linux-2.6.32-gnu-amd64" \
   --artifacts="${artifacts}" \
   --slack-token="${SLACK_TOKEN}" \
   "${TESTS}"