basalt-26.3.2-rc-20260916: testutils/testcluster: TestClusterSqlDisabled failed

testutils/testcluster.TestClusterSqlDisabled failed on basalt-26.3.2-rc-20260916 @ 024cf0f74e8abea8b9fe2f4a05441dac7dc66c41:

google.golang.org/grpc/internal/transport.(*Stream).Read(0xc0303ddc20, {0xc0278c1b40, 0x5, 0x5})
	external/org_golang_google_grpc/internal/transport/transport.go:498 +0x11f
google.golang.org/grpc.(*parser).recvMsg(0xc0278c1b30, 0x7fffffff)
	external/org_golang_google_grpc/rpc_util.go:600 +0x6a
google.golang.org/grpc.recvAndDecompress(0xc0278c1b30, 0xc0303ddc20, {0x0, 0x0}, 0x7fffffff, 0x0, {0xa3b6830, 0x11d5c600})
	external/org_golang_google_grpc/rpc_util.go:730 +0x7c
google.golang.org/grpc.recv(0xc0278c1b30, {0x7f8fc02d2f10, 0xc0012a9e60}, 0xc0303ddc20, {0x0, 0x0}, {0x9e9ac60, 0xc003c18d80}, 0x7fffffff, 0x0, ...)
	external/org_golang_google_grpc/rpc_util.go:796 +0xc8
google.golang.org/grpc.(*serverStream).RecvMsg(0xc02f03c3c0, {0x9e9ac60, 0xc003c18d80})
	external/org_golang_google_grpc/stream.go:1712 +0x2f1
github.com/cockroachdb/cockroach/pkg/server.(*Node).batchStreamImpl(0xc0035c8008, {0x7f8fba595100, 0xc0338d4e70})
	pkg/server/node.go:1968 +0xc2
github.com/cockroachdb/cockroach/pkg/server.(*Node).BatchStream(0xc0035c8008, {0xa42bb58, 0xc0338d4e70})
	pkg/server/node.go:1955 +0x5a
github.com/cockroachdb/cockroach/pkg/kv/kvpb._Internal_BatchStream_Handler({0x9e8cee0, 0xc0035c8008}, {0xa415a78, 0xc02f03c3c0})
	bazel-out/k8-fastbuild/bin/pkg/kv/kvpb/kvpb_go_proto_/github.com/cockroachdb/cockroach/pkg/kv/kvpb/api.pb.go:12768 +0xe6
github.com/cockroachdb/cockroach/pkg/rpc.NewServerEx.StreamServerInterceptor.func13({0x9e8cee0, 0xc0035c8008}, {0xa415a78, 0xc02f03c3c0}, 0xc036760000, 0xa347ce0)
	pkg/util/tracing/grpcinterceptor/grpc_interceptor.go:107 +0x710
google.golang.org/grpc.getChainStreamHandler.func1({0x9e8cee0, 0xc0035c8008}, {0xa415a78, 0xc02f03c3c0})
	external/org_golang_google_grpc/server.go:1504 +0x231
github.com/cockroachdb/cockroach/pkg/rpc.NewServerEx.func4({0x9e8cee0, 0xc0035c8008}, {0xa415a78, 0xc02f03c3c0}, 0xc036760000, 0xc01d0d7200)
	pkg/rpc/context.go:191 +0xd7
google.golang.org/grpc.getChainStreamHandler.func1.getChainStreamHandler.1({0x9e8cee0, 0xc0035c8008}, {0xa415a78, 0xc02f03c3c0})
	external/org_golang_google_grpc/server.go:1504 +0x116
github.com/cockroachdb/cockroach/pkg/rpc.kvAuth.streamInterceptor({0xc0028c0000, {{0x1}, {0xa4386e0, 0xc002454a20}}, 0x0}, {0x9e8cee0, 0xc0035c8008}, {0xa415a78, 0xc02f03c3c0}, 0xc036760000, ...)
	pkg/rpc/auth.go:192 +0x57d
google.golang.org/grpc.getChainStreamHandler.func1({0x9e8cee0, 0xc0035c8008}, {0xa415a78, 0xc02f03c3c0})
	external/org_golang_google_grpc/server.go:1504 +0x231
github.com/cockroachdb/cockroach/pkg/rpc.NewServerEx.func2.1({0xc0026ab040?, 0xa3d9490?})
	pkg/rpc/context.go:148 +0x66
github.com/cockroachdb/cockroach/pkg/util/stop.(*Stopper).RunTaskWithErr(0xc0026ab040, {0xa3d9490, 0xc0278c1b90}, {0xc00c6ddf20, 0x27}, 0xc01178f7d0)
	pkg/util/stop/stopper.go:358 +0x237
github.com/cockroachdb/cockroach/pkg/rpc.NewServerEx.func2({0x9e8cee0, 0xc0035c8008}, {0xa415a78, 0xc02f03c3c0}, 0xc036760000, 0xc01d0d7180)
	pkg/rpc/context.go:147 +0x15a
google.golang.org/grpc.NewServer.chainStreamServerInterceptors.chainStreamInterceptors.func2({0x9e8cee0, 0xc0035c8008}, {0xa415a78, 0xc02f03c3c0}, 0xc036760000, 0xa347ce0)
	external/org_golang_google_grpc/server.go:1495 +0xdd
google.golang.org/grpc.(*Server).processStreamingRPC(0xc0028ef680, {0xa4399a0, 0xc00461dba0}, 0xc0303ddc20, 0xc0018366f0, 0x10783de0, 0x0)
	external/org_golang_google_grpc/server.go:1659 +0x20f5
google.golang.org/grpc.(*Server).handleStream(0xc0028ef680, {0xa4399a0, 0xc00461dba0}, 0xc0303ddc20, 0x0)
	external/org_golang_google_grpc/server.go:1739 +0xfa5
google.golang.org/grpc.(*Server).serveStreams.func1.1()
	external/org_golang_google_grpc/server.go:970 +0x173
created by google.golang.org/grpc.(*Server).serveStreams.func1 in goroutine 6159
	external/org_golang_google_grpc/server.go:981 +0x253

goroutine 391116 [select]:
google.golang.org/grpc.newClientStreamWithParams.func4()
	external/org_golang_google_grpc/stream.go:383 +0xe7
created by google.golang.org/grpc.newClientStreamWithParams in goroutine 391115
	external/org_golang_google_grpc/stream.go:382 +0x1c9f

Parameters:

• attempt=1
• race=true
• run=3
• shard=2

Start with testutils/testcluster.TestClusterSqlDisabled and inspect the linked Mesolite invocation, then trace the reported stack through pkg/server/node.go's BatchStream entry point. Reproduce the failure with race=true and run=3, shard=2. Done means the underlying failure is addressed and the test passes on the affected branch.